Doesn't detect wifi. Troubleshooting Wi-Fi network connection problems on laptops

Having worked for many months and even years on the Web from one router, one day the user will notice that the Wi-Fi or cable connection suddenly disappeared. But any problem, except, perhaps, breakdowns on the part of the provider, can be solved unilaterally, on our own.

A PC or laptop does not "see" the router - what is the reason

Physical reasons include the following.

Breakdown of the LAN interface by high voltage (for example, by lightning through a twisted pair cable passing over the roofs of private houses). This also includes static electricity when servicing LAN / ONT equipment (accidental contact with electrified clothing, leads and bare wires of repaired cables).
Breakdown of the router for power (using an adapter with a significantly higher output voltage, for example, from a laptop). In the best case, this will cause the voltage regulator to burn out, from which all other functional nodes of the router are powered. In the cheapest models of routers, the entire board can burn out - such a router is immediately changed.
Failure of wireless communication in the router due to overheating of the chip of the Wi-Fi radio subsystem or the processor on the mono-board of the router.
Power shortage (power supply "sagging" in voltage when using a home-made or industrial redundant power system, for example, several PowerBank devices connected in series by the output voltage until the required supply voltage is obtained). Lack of power (planned power outages, the adapter plug is not inserted into the socket, the adapter itself is out of order).
Internal short circuits or wear when operating in conditions of high humidity and extreme temperature fluctuations.
Damage to LAN cables (if a local network connection is used precisely by cable), loose and bent pins of the LAN jacks in the router and in the network card of the PC / laptop.

The software reasons are as follows.

The router freezes due to overheating caused by operating in extremely hot conditions. The reason can also be the natural wear and tear of the flash memory of the router and other microcircuits after intensive work for many years.
The ingress of malicious code via a LAN connection or via Wi-Fi from a PC that changes settings. Only reinstalling the Windows version on a PC or tablet from which the virus penetrated the router's firmware will help here, and flashing the router itself and re-configuring it.
Viral activity in the PC / laptop / tablet / smartphone itself, which can seriously disrupt Windows / Android. In this case, the OS is reinstalled from scratch.
The abundance of simultaneously used programs that slowed down the work of the PC / gadget.

In the last two cases, due to performance disruption, network settings control is lost.

Checking the integrity and correctness of the LAN cables connection

Most routers, such as TP-Link devices, have up to several LAN ports and one WAN port ("provider" input). There are two schemes for organizing a small local area network with shared Internet access.

Whichever scheme you prefer, the network cables must be connected correctly. If something is confused, connect the cables according to one of these schemes and configure the router for its features.

Pay attention also to the integrity of the crimping of the cables in the RJ-45 connectors.

Do not cut the sheath outside the connector retainer

Perhaps one of the wires has fallen behind - this is fraught with Windows error messages ("Restricted access", endless "Identification" or "Unidentified network" - even if the settings are correct everywhere and the router with modem / terminal is 100% working properly).

Restarting Windows and the router

The router is restarted using the Power button on the rear panel. But you can also turn off and on the power adapter.

Turn the router off and on by successive button presses

Using the web interface, TP-Link routers, for example, are restarted by the "System Tools - Reboot" command.

Restart from the web interface is available if there is a LAN or Wi-Fi connection

Windows 10 is restarted by the command "Start - Restart".

PC restart command

Operators of the call-center of providers like to advise restarting equipment, but often the problem is still not in random failures during operation, which can be solved by rebooting.

Checking the Wi-Fi connection on the router

In routers, except for LAN and Wi-Fi, nothing new has yet been invented for local communication.

Other types - connection via infrared or Bluetooth - are primarily inherent in mobile devices that have a USB modem mode and a virtual access point.

If a Wi-Fi wireless network is not visible on a PC or laptop, try to connect to it using an Android gadget. The solutions to the Wi-Fi problem are as follows.

Checking Ethernet ports and cables on PC and router

If the PC does not connect via LAN, check if the router is visible from other PCs and laptops (if any).

If the connection is successful, check if the LAN adapter is enabled on this PC, and also coordinate its connection settings with the router settings on the router itself.
Wi-Fi settings must be consistent with the DHCP of the router
If there is no connection, check your PC for viruses and other harmful applications.
Check the integrity of the cable, connectors and the operability of the LAN network card - when the connection is working, they should blink green and yellow LEDs located in the LAN socket on the PC.
Connect the cable from this computer to another LAN connector on the router - when the connection is working, the LAN connector should light up on the router itself, and the corresponding LAN indicator (LAN-1 ... LAN-4) should light up on the display panel.
The ZyXEL router shows that the LAN ports in it and on the existing PCs are working
If the check revealed a faulty LAN socket on the router (cable connection does not work on all PCs and laptops) - for example, the pins of the LAN socket are bent or "clasped", then use another LAN socket. If one of the computers, due to the failure of one of the LAN ports to which it was previously connected, remained "out of work" - purchase the simplest LAN switch (or LAN-Hub), a piece of Cat-5e cable and additional connectors , connect the Hub near the router using additional short cables, and connect both this PC and its "neighbor" to it.
The number of LAN connections can be unlimited
In the event of a static discharge in the LAN switch of a router, all LAN sockets often stop working. In this case, use the Wi-Fi connection of all PCs. In case of a malfunction and the Wi-Fi module (the entire router board is burned out), replace the router itself.

Video: how to use a Wi-Fi access point if the WAN port is burnt out

Replacing network cables

Depending on where and which cable is “broken”, an appropriate repair of the damaged line is required.

With a simple breakage, a "twisted pair" can be repaired by restoring the interlacing of the wires (for example, the step of the "orange" pair's turn differs from the step of the "green" or "blue") as accurately as possible, as if the cable had not been damaged.

Changing the pitch of the turns of the pairs at the point of the break will reduce the speed of the line

In this case, there is a chance that the speed of 100 Mbps will not turn into 10 Mbps - if it is very important for you, for example, you use not only the Internet, but also often send multi-gigabyte files between PCs and gadgets over your local network, print large format maps and high resolution drawings, etc.

If the cable is damaged so much that its use is impossible (the sheath is broken, the insulation of individual wires is worn or cracked from old age and extreme temperatures, the interlacing of pairs in many places is broken), a new cable is required. Or, if the "forwarding" of a new cable is impossible (there are no conditions, work is prohibited, etc.), and there are only one or two places of damage, special LAN adapters and simple switches for 3 LAN sockets are used.

LAN splitters will also help where the network cable is broken

Especially often cables break and crack, in which copper-plated aluminum is used as a conductive medium, cable sheathing and wire insulation - not polyethylene or PVC, but made of plastic compound with chalk.

The best Cat-5e cable is twisted entirely of copper wires, and each wire is a cable made of the finest "strands", often with lavsan filler; the insulation and sheath of the cable are made of heat-resistant plastic. Such a cable is used for outdoor laying, it is resistant to repeated bends, overheating and hypothermia, will last for many years - but it also costs 2-3 times more. If you are used to investing in high-quality equipment and lines, creating a network for many years, use the best.

If you crimp LAN connectors and solder a torn twisted pair cable costs nothing, then entrust the repair / replacement of optical cables to the specialists of your provider. Fiber optics are not copper wires: the slightest mistake of inexperience will turn your 300-megabit connection from Rostelecom or Dom.ru into a slow-speed connection, where even browser pages will barely open, like on overloaded 3G during peak hours -networks. Even if you have a special soldering iron for splicing optical conductors of FOCL, you need skill.

Using other routers

If you have a router of another brand (when you changed it to the current one, which is now out of order), connect it. Users who part-time in computer services are likely to have some decommissioned equipment that they use to diagnose failed routers and network cards brought in for repair by their customers.

You can buy a used router or access point (a few years old) if you don't want to spend money on a new device. It connects and configures in the same way as your previous device. Really outdated models may not have a WAN interface (and related settings), as well as modes of operation in bridge and repeater mode (a simple Wi-Fi access point with a LAN router without numerous settings), so it is used as a simple LAN switch. Connect your LAN cables in the same sequence, complete the settings on the device and go online.

Resetting the router to factory settings

As an example, TP-Link routers. It's simple.

The router will restart. After a minute, the Wi-Fi network will be with the default settings.

If it was not possible to reset the router (freezing, inaccessibility of settings) - use the reset button (it is protected by a tiny hole from accidental pressing).

Video: how to set up a TP-Link router after a factory reset

Any hardware and software problems in the home or office network, including failures in the router and on any of the internal lines, can be solved. Otherwise, the network equipment itself changes, up to network cards and adapters. Great speed to you - and effective work!

The situation when the laptop does not see the wifi network is quite common. Any user can face this problem. But to fix the problem, not everyone can do it. Therefore, we decided in this article to tell in detail why the laptop does not see the Wi-Fi network. Let's touch on the main reasons and, of course, how to eliminate them.

The first reason. Checking the router

First you need to check if everything is in order with the router. The easiest way to make sure the router is working is with a tablet, smartphone, netbook. Turn on and scan the radio, you will see a list of networks available for connection. Find the network you need, try to connect. If the gadget connects without any problems, then everything is in order with the router. And if the gadget does not see your Wi-Fi network, then there is a problem with the router.

Let's take a look at simple troubleshooting steps that anyone can do:

There is an “ON / OFF” or “On / Off” button on the back of the device, you just need to press it. On the front panel, the LEDs will all turn off, and then press this button again, the LEDs will turn on again. It is also possible to simply pull out the power supply from the 220V socket and insert it back after 5 seconds.

Lost settings

Due to a voltage drop (as well as a number of other reasons), the settings could fly off. In this case, you will see your WiFi network under a different name. These will be the default settings. Ideally, we recommend that you reset the settings again before configuring. To do this, take a match and press the "Reset" button, hold it down for 15-20 seconds. Now you can safely start entering parameters on the router. If you do not know how to do this, then on our website find an article with a full description of how to connect and configure a Wi-Fi router.

Changing the Wi-Fi broadcast channel

It happens that a laptop sees a bunch of unfamiliar wireless networks, but does not see its own network. Most often, this problem occurs on gadgets (smartphone, tablet). What's the catch, you ask? There are several reasons for this:

Perhaps the neighbors, at the or the router, set the broadcast channel the same as yours. Their signal is stronger, so it clogs your signal.
Modern routers can operate at 5 GHz, but laptops often do not know how to work at these frequencies. Therefore, when choosing a frequency, make sure your device supports that frequency.
There is a 14th channel in the wi-fi, which you could forcibly set on the router. Or you have the “Auto” mode in the “Channel” item. As a result, many devices will not see and connect. Keep in mind that not all gadgets can work in the 14 (2.484 GHz) channel.

To fix the situation, go to the router settings menu and change the channel:

We launch the browser, register the IP address of the router in the command line.
In the settings menu, we find the "Wireless" section, then click on "Wireless Setting".
The "Channel" column displays the current broadcasting channel, change to any other.

Weather conditions

Don't have wi-fi after a thunderstorm downpour? It is not surprising, because after such weather conditions, routers are brought en masse to service centers. Not everyone knows that Wi Fi routers are very afraid of thunderstorms. After such a bad weather, it often happens that the router is working, everything is glowing, but there is no Wi-Fi, the reason for this: the Wi-Fi module burned out. Therefore, we recommend that in case of a strong thunderstorm, disconnect the power supply, pull out all network cables (twisted pair) from the back of the sockets. Just pull it out carefully, do not jerk too much, otherwise you will tear off the RG 45 plug. Then you will have to read our article,

The second reason. Laptop problem

After making sure that the router is in good order, we continue to find out why your computer does not see the Wi-Fi. Now we will calculate the malfunction on the PC. Of course, we will not disassemble the laptop and check the WiFi adapter, but we will provide simple troubleshooting methods that any user can perform.

Wi-Fi module inactive

Checking the availability of drivers on the WiFi adapter

There is a chance that your laptop does not see Wi-Fi due to the lack of drivers. This can happen for a variety of reasons. For example, your PC got infected with a virus, accidentally deleted the wrong folder, turned off the computer incorrectly, or simply flew off. Therefore, it is necessary to check.

We find "Search in Windows", either in the start, or on the desktop, click.
We write “ Device Manager". A window will pop up, in which you need to open " Network adapters».
We have this " Realtek 8821AE Wireless LAN….". You may have a slightly different name. We see that there is no exclamation mark in yellow, which means that the drivers are all right. If there is an exclamation mark, it means that there is a problem with the drivers.

Your task is to download fresh drivers from the official website of the laptop manufacturer and install them.

Checking whether the WLAN autoconfiguration service is running or not

You need to check whether the WLAN autoconfiguration service is enabled or disabled. Without this service running, all adapters will be unavailable. Well, and accordingly, the computer will not see the Wi-Fi network.

We register the words "Services" in the search bar in Windows.
We find " WLAN autoconfiguration service", Hover the cursor over this service, right-click. If it works, then there is nothing unnecessary to do, if disabled then select "Run".

We carry out troubleshooting

The diagnostic option doesn't help often, but it's worth a try. Click on the WiFi icon, which is located in the tray (there is a time next to it). Several options will pop up, select " Troubleshooting". The check will take a couple of minutes, at the end of Windows will give options for solving the problem.

The problem with the wi-fi adapter

Not sure why the laptop does not see the wi fi network? Try to remember how old he is. Perhaps he is already 10 years old, then it is not surprising, any device has a lifespan. You will hardly be able to disassemble the laptop and check the Wi-Fi adapter. It is better to contact the service center, they will carry out a full diagnosis there. Then they will announce the verdict to you.

Signs of problems in which you need to seek help from specialists:

The module works, but there is no Wi-Fi connection and does not respond to commands.
The adapter stopped memorizing the entered settings. Because of this, the laptop sees but does not connect.
The adapter is missing in the task manager.
Began to connect only at a distance of no more than one meter.
Periodically disappears, or the wifi on the laptop disappeared completely and the reboot does not help.

Conclusion

After reading to the end, we hope you understand why the laptop does not see Wi-Fi. In the article, you will find a suitable way to solve this problem. Do not forget that first of all it is better to double-check the router, and then dig into the laptop. Because most often the problems occur in the routers.

Unfortunately, many of us have faced the problem when the laptop stops finding the wireless network, which creates a noticeable inconvenience. Considering that the laptop can be used outside the home, the user may be left without the Internet at all. There can be a lot of reasons for this little pleasant moment. But, as a rule, the problem is technical, or in the wrong operation of the software. To understand how to cope with the problem, let's look at it in more detail.

In order to understand the causes of the problem and understand why the laptop does not find a WiFi router or home WiFi network, you need to know what WiFi is and understand how this wireless communication system works.

WiFi is the same local network, only without the need to lay a cable. The connection to the network occurs through a signal that is transmitted through radio waves. This system has gained popularity not so long ago. A dozen years ago, no one knew about it, and the signal distance was much less. To be precise, the signal can be sent over a distance of 100 km.

In addition, WiFi is a registered trademark that is actively developing. In 2014, the data transfer rate over WiFi should increase to several Gbps.

To put it simply, now this method of connecting to the network is very popular. Almost every laptop has a built-in sensor that allows you to use a wireless network. At bus stops, cafes or any other public places, the owners install free access points, which increases the level of comfort of the establishment or public place.

As mentioned above, the main reasons can be roughly divided into technical and software. In the case of technical ones, the owner of a laptop will most likely have to contact a service center and spend money on repairing it. At best, deal with the reason for the poor performance of the router.

WiFi on laptop and router

It's worth starting with the very basics, which can be forgotten due to haste or inattention.

Make sure the receiving antenna is turned on. If the WiFi button does not work, then the problem is obvious. Not all laptop models have this switch, but some do. Most often it looks like a latch rather than a button. In other words, it depends on the manufacturer. With a switch, there can be a signature or a picture of the antenna, which stands for WiFi.

If there is no such button on the laptop model, then you need to pay attention to the lower panel of the operating system, to the icon next to the time. The image should show if the wireless connection is active at the moment.

It is possible that this icon is not on the panel next to the time.

To check activity without using this icon, you need:

Checking available networks

The next thing to do is check the available networks. Perhaps the router simply does not reach the laptop's antenna and for this reason it is impossible to connect to the network.

This requires:

click on the network icon in the lower right corner, on the bottom panel, next to the time.
Select the "Connect to the network" item and select the desired access point. Most likely, there will be more than one access point, since you can see neighboring or some other routers. But, in most cases, a password is put on the access point, thus protecting it from unauthorized users.

Video: What to do if your ASUS laptop can't find Wi-Fi

The laptop does not see the WiFi network: the main reasons

Why can't my laptop see the WiFi network? Perhaps the solution to the problem is right in front of you and only takes five seconds. But there are also more severe cases. Let's consider the most common options.

Router

It is worth making sure that the router is turned on. Its operation can be easily identified by the indicator lights. After connecting, look at the corresponding icons in the instructions for the router and determine if the wireless connection is active.

If the router does not respond at all, then the problem is purely technical. In this situation, you should look for a problem in the wires, power supply, or carry the router for repair. As a rule, it is easier to replace a router with a new one than to give it to service centers for inspection.

Drivers

As you know, any hardware requires software that guarantees stable operation. If the laptop does not detect WiFi, then it is worth checking the drivers. Even if they are installed, it is recommended to update them.

You can check the drivers through the control panel. In the "device manager" section there is a line "network adapters", which should contain the name of the router, if the problem is in the drivers. Right click on it and see the driver version. Compare it with the current version, which can be found on the Internet.

If the version is outdated, download the new one and install. It is best to download from official sources. Hardware drivers are distributed by developers for free, and you shouldn't risk the health of your operating system in vain.

Signal distance

If, after searching for a network, the answer appears: "No available connections" - think about the signal. In apartments, this option is not very relevant, since modern routers have a strong signal and spread it far enough. But in private homes or other places where the distance can be quite large, the signal may simply not reach the laptop. Therefore, you should not be surprised if the Internet suddenly disappeared when you were walking around the house or yard.

Mac address

There are situations when it was possible to connect, but the router does not see the Internet through my WiFi or has stopped seeing. When using the services of some providers, the user cannot just change the network adapter, as the Mac address changes.

The Mac address is written on each router and the user only needs to call the operator to bind the new address to replace the old one. You may be asked to dictate it in full, or to clarify only the last few values of the entire number.

Antivirus or third-party programs

Third-party programs installed on a laptop may conflict with drivers or interfere with the correct establishment of an Internet connection, which often happens when the device sees wifi but does not connect. In addition, sometimes antivirus software interferes with creating a connection. If possible, it is better to try first to connect the Internet without a router. If all is well, then the software is not to blame.

In addition to the above, there can be a lot of reasons. Basically, a variety of reasons are due to malfunctions in the operating system. Therefore, if all else fails, try reinstalling your operating system. Perhaps all the problems come from here.

Laptop does not see WIFI network on windows7 / on windows 8 / on windowsXP

For those who are wondering why the laptop does not see wifi windows 7, first of all, you need to try manually turning on the wireless network.

This requires:

In windows 8, activity is checked through the "PC Settings" item. Next, you need to select the line "wireless" and move the slider on the right side of the menu to the "On" state.

When using windows XP, the wireless network does not require manual activation and, as a rule, is connected, like windows 7. It is enough to activate it through the control panel or through the wireless icon through the bottom panel of the system.

Video: how to create and configure a WI-FI network

How to set up a wireless network

For a comfortable use of the network, some users resort to settings. Usually, the standard settings are enough, but if you want, you can delve into your personal account. It is through the personal account that the parameters are changed.

The login and password are indicated by the manufacturers of the router, and you can find these data in the instructions. The address is also indicated there, which will lead you to your personal account. It is best to replace the standard data so that no one can use it.

All other settings are made on the laptop itself, and they are installed using the Network Control Center.

WiFi without internet due to windows

There are rare cases when the operating system itself does not want to detect a wireless connection and shows that there is no external network at all. This option can be when using non-licensed operating systems. Some people prefer to use amateur assemblies, which do not load the system so much and allow you to squeeze more out of iron.

Another reason could be "blockage" of the system. System folders, over time, become clogged with unnecessary files and if you do not defragment, the processor will be loaded more and more. Antiviruses also cannot keep a laptop clean forever.

In any case, all problems with the OS are solved by a simple reinstallation. After reinstalling windows, everything should work. Thus, the solution to the problem lies only in the operability of the router, WiFi enabled on the laptop, or in the presence of the necessary software. Subject to these points, WiFi will not provide difficulties, and will delight the user with stable work.

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The computer does not see the Wi-Fi network

WiFi wireless technology is widely used all over the world. Everyone knows about it, and there are practically no people left who do not use it. Connecting to an access point is extremely simple and does not require any knowledge. However, everything is not always so smooth. Quite often, there are cases when the computer does not see available WiFi connections.

But before proceeding directly to troubleshooting, you should delve a little deeper into the principle of operation of this technology. The fact is that to connect to a WiFi network, you need a router that acts as an access point. This means that if there is no signal, the first thing to check is the access point.

Why does my computer not see available WiFi networks?

If the router is turned on and working, but the computer still does not see the Wi-Fi network, then you should go to the system settings. There can be many reasons for this error:

Drivers for network equipment are not installed.
Hardware error.
Disabled wireless network connection.
Defective WiFi module.

In addition, there are other problems. However, it is simply impossible to describe everything. Therefore, we will analyze the most common connection problems.

Checking the driver for network equipment

What if the computer does not see the WiFi network?

The first thing to look out for is the driver. This is special software that controls the operation of a particular equipment. Thus, if the driver for the network adapter is missing or does not work correctly, then, accordingly, the WiFi module itself will not be able to work normally.

You can check this in the device manager. Click on the "My Computer" shortcut (you can find it in the file manager or in the "Start" menu) with the right mouse button and select "Properties". In the window that appears in the left menu, you need to find and open the item "Device Manager". Here we see all the devices that are connected to the laptop. Among them you need to find network equipment. Read here how to properly configure your wireless WiFi adapter.

Open the branch with network adapters. The absence of such a branch indicates that the drivers for the WiFi adapter are not installed on the computer at all. If the device manager displays network devices, then you should check if the exclamation mark is lit on any of them. If there is such an icon, then this also indicates the absence or incorrect operation of the driver.

In any case, this is solved by a simple reinstallation of the software, which can be downloaded from the manufacturer's official website. Or, if a disc was included with the laptop, then everything that is needed can be installed from it. The WiFi adapter in Device Manager is usually named Wireless Network Adapter. The driver is the main reason why the computer cannot see the wireless WiFi network. If the drivers are in order, but the problem is not fixed, then go ahead.

How to Reinstall WiFi Driver on Laptop: Video

Checking Wireless Status

The next reason why the computer does not see wireless WiFi networks is if the connection is turned off. How can I check this? First, you need to open the Network Control Center. This is done differently on different operating systems. For example, on windows8, you can simply right-click on the network icon in the tray and select "Network Control Center."

You can also open the service as follows. Press the key combination Win + R and write control panel in the window that appears. Presses "Enter". Thus, we launched the control panel. Now we follow this path - Network and Internet Network and Sharing Center. It should be noted that this option for starting the service is suitable for all versions of windows. In the window that appears, we are interested in the item "Change adapter parameters". It's in the left menu.

In the window that appears, we see all the connections available on the computer. We find "Wireless network" (if windows7 is used, then "Wireless network connection"). If the label is gray, it means that the connection is disabled. To enable it, click on it with the right mouse button and select “Enable”.

After that, the system will turn on the connection and start searching for available networks. In some cases, if the computer still does not see the Wi-Fi network, then after the procedure done, you will need to turn on the module on the keyboard using the Fn key combination + the adapter power button.

Performing diagnostics

If you have followed all the above options, but the computer still does not see the Wi-Fi network, then you can resort to system diagnostics. To do this, open the Network Control Center and go to the "Change adapter settings" item.

Here we find the shortcut for the wireless connection and click on it with the right mouse button. In the window that appears, select "Diagnostics". After that, the computer will start troubleshooting and fixing them on its own. After that, he will display a message about the detection of problems (if any) or tell you what to do next.

What to do if the laptop does not see the Wi-Fi network: Video

Hardware error

What does a hardware error mean? This is a problem directly in the board itself (network card). In other words, if the computer does not see the wireless WiFi adapter, then this indicates that it is not working. This can happen for two reasons:

What to do if WiFi does not work on a laptop: Video

What to do if the laptop does not see the Wi-Fi network

What to do if a laptop with windows 7 does not see Wi-Fi

Doesn't see the network adapter on windows 7

windows XP does not see wifi

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The laptop does not see the wifi network: what to do? | Your setevok

The problem of incorrect display or complete absence of available wifi networks is quite common and affects not only laptops, but also stationary computers, tablets, smartphones, etc.

There are a lot of possible reasons why the Internet on a laptop via wif does not work well. In order to choose the right solution to this problem, you need to assess which "scenario" your situation refers to: the laptop has stopped seeing wifi networks altogether (ie, a complete "ignore" of wireless connections), or the laptop does not see wifi from any one point access, easily identifying other sources of the Wi-Fi signal.

Why doesn't wifi work on my laptop?

To begin with, it is worth analyzing the most common scenario - complete "ignoring" by the computer of all wireless networks. Those. Are you sure that:

- the router normally distributes a signal and the access point is "open" for connection;
- there are other available wifi networks nearby;
- other devices (for example, a cell phone) easily detect active sources of a wireless signal.

But at the same time, your laptop does not find a single wifi network and does not connect to the Internet - i.e. Wi-fi on the laptop stopped working altogether.

1. To solve this problem, first of all, it is worth checking if the "wireless network adapter" is enabled at all. For this:

- open the "Device Manager", in the "device tree" select "Network adapters";
- in the list that opens, there should be an adapter for your wireless network (the name of which depends on the model of the device and you can clarify this parameter in the documentation for the laptop);

- there should not be a triangular yellow icon with an exclamation mark next to the adapter name - it means that the wireless network adapter is disabled, or the network driver installed and used by the laptop does not work correctly;
- to turn on the Wi-Fi adapter on the laptop, right-click on it and click "Enable / Connect";
- if the driver does not work correctly - download and install the current version of the program for your laptop. Or remove the device through the "Device Manager" (first download the required driver - for safety reasons) and restart the PC - the adapter should appear automatically.

In addition, you can check the adapter through the "Control Panel" - "Network and Sharing Center": if the adapter is enabled, then there should be a section either "Wireless network adapter" or "Wireless adapter".

2. Perhaps the laptop does not see the Wi-Fi due to the fact that the network is disabled by a keyboard shortcut or a special switch on the case: for laptop owners, this reason is most relevant.

It is worth paying attention to the combination of keys "FN + F2" / "FN + F3" / "FN + F9" / "FN + F12" (depending on the laptop model) - this combination enables / disables the network and is intended mainly for those who often flies (accordingly, this mode is called "On the plane" - a similar function is available in most modern smartphones and tablets).

3. If the laptop stopped seeing wifi after the device was disassembled (to clean the upgrade from dust), then it is possible that the wireless module was physically disconnected during the disassembly or the integrity of the connection wires was broken. In this case, the solution to the problem, accordingly, will be to connect the adapter (and in the event of a physical malfunction, replace it with a working module).

Why does the laptop not see wifi, but other devices see the router?

Now let's consider the situation when the laptop selectively does not see the "wifi" network. It is worth noting that most of the problems with wireless networks can be resolved by updating your network drivers.

So, there is a certain network that works and is displayed on other devices, but the laptop with great persistence does not want to see it. You can do the following:

First of all, try changing the encryption method in the wifi security settings

and modify with the parameter "Channel";

Try to change the name of the network - try to avoid complex symbols in the name.

Also, the reason that the laptop does not see the wifi network on windows 7 / windows 10 may be the infection of the computer with viruses and problems with the hardware.

This applies directly to the computer, however, the culprit for the fact that the laptop does not see the Wi-Fi router may be the source of the wireless signal itself.

- check the relevance of the installed firmware on the router: if the firmware is outdated, then, accordingly, update it to the most recent version;
- reset the router configuration to the default value (factory settings) and reconfigure the router;
- in some cases, installing an older version of the firmware helps, with setting up the network configuration and then updating the firmware.

Thus, the most relevant and effective solution to the problem "the laptop is not looking for Wi-Fi" is to check the functionality of the wifi module and install the latest drivers.

To avoid such a problem, it is worth regularly updating your computer software (manually or using special programs).

tvoi-setevichok.ru

The computer does not detect a wireless Wi-Fi network

There are times when Wi-Fi stops being available on the computer. Why this happens and what to do in each specific case will be discussed in this article.

The problem can be of two types: the computer does not see the Wi-Fi network at all, or only your access point is not in the list of available neighbor networks. In the first case, the problem is most likely in the wi-fi device, in the second - in the computer on which the network disappeared.

First steps

What's the first thing to do? You can reboot the router or computer on which the network has gone missing. Make sure to enter the correct password and not enable Caps Lock. If the passphrase is correct, but the computer does not connect, then you need to look for other reasons.

If the computer does not see any access points at all and / or has stopped seeing them: you need to check if the Wi-Fi adapter is active. To do this: on the computer keyboard, press the key combination "Fn + F3" (depending on the model and manufacturer, there may be a combination of "Fn + F2" or "Fn + F5"). The keyboard drivers must be installed for the keyboard shortcuts to work. On older models, the ability to see Wi-Fi is sometimes turned on with a separate button.

Network problems

If you have installed the drivers for the keyboard, turned on the Wi-Fi module, but there is still no Internet, then open the "Control Panel". Select "Internet Networks" and in "Sharing Control" select "Changes to adapter settings." Here you will see a list of all adapters. Click on the "Wireless network" item. If the gray icon and the inscription "Disabled", then there is no Wi-Fi icon in the system tray, which is why nothing works. In this case, you need to enable: right-click the context menu and select “Enable”. The wireless network becomes active. In case of an error, the launch of "Windows Networks Diagnostics" helps. The system itself can find and fix errors.

If after that the computer does not detect an available network, then reinstall the drivers for the wireless network adapter. Open "Device Manager", click on "Network adapters", find the desired device. You need to uninstall and reinstall the driver. Drivers can be taken on the official page of your computer manufacturer or found a CD with a working driver bundled with your computer. After installing the driver, you need to turn on the Wi-Fi module and see the work - if everything was activated, we figured out why the network disappeared.

Sometimes it happens that the laptop does not see the wireless network after being repaired or after cleaning. The masters can turn off the antennas. Then you need to disassemble the laptop case and connect them or seek help from specialists.

Router problems

If the problem is that the computer does not see only your router, but sees others, then you need to do the following steps. Find the settings of the router and check the operation of the Wi-Fi adapter. To do this, open a browser and enter http://192.168.1.1 or http://192.168.0.1 in the address bar. If it did not work out, the data on the ip-address and authorization in order to enter the page can be taken from the sticker attached to the back of the router case or on the manufacturer's website. On the router's page, you need to find "Advanced settings", the "Wi-Fi and network settings" tab. You need to set the "Enable wireless connection" flag. If the flag is on, but for some reason the problem remains, then the last method is to change the channel on which the router is running. In order not to change the channel blindly, you can use the program "inSSIDer for Home", which analyzes the frequency range of the channel. From 1 to 11 channels - the American standard for Wi-Fi, most devices can do work on these channels. Available from 11 to 13. When changing the settings, do not forget to click "Save".

You can try to remove encryption, the setting is called "Authentication Method", change to "Open System". The problem might be the length of the key ("WPA Preshared Key"). If it is more than 20 characters, then the router will stop working with such a long key. Most likely, the key can be no more than 12-13 characters. You can also update the firmware right there: "Administration" section, "Update firmware" tab.

Software

Why are there still difficulties? The problem might be in the software. If "System Restore" is enabled in your windows, then restore points will be shown in the log when installing programs. You can return the operating system to the day the network was up and let it see connections again. You need to select a state, click "Next", follow the instructions. Wi-Fi network can often disappear when updating the OS, so sometimes you have to reinstall programs after updating, including for a wireless connection, and then the computer again sees what it needs.

Adapter malfunction

If all else fails and the computer still does not see the available networks, then there is a possibility that the Wi-Fi adapter could fail: it may burn out during operation, it needs good cooling. If it burns out, it will not be displayed in the "Device Manager", this problem will be displayed in the "Windows Diagnostics". It will need to be repaired or changed.

So, we have considered the most basic sources of problems when a computer fails with Wi-Fi. Remember that any problem can be fixed if you know its causes.

InstComputer.ru

The computer does not see the desired wi-fi point.

So, a couple of months ago I ran into one common household problem. A laptop (windows 7) sees many different wi-fi points, but does not see the desired wi-fi point (the one to which it needs to connect), and all other computers have perfectly established a connection and have been downloading porn from the Internet for a long time.

Googling on the Internet, I found a very trivial solution: I changed the channel of the Wi-fi point (in the settings of the access point).

I suppose that this is because lately there are wi-fi points in almost every apartment, and many of them have a self-determination of the range. It works as follows: the point turns on and scans everything around, determines the occupied channels and chooses the one that is not busy, but due to the fact that your computer is far from it, it may well catch the signal that your point did not catch. You turn on your computer, it also scans everything around and is the first to pick up a signal from the point that your point overlooked. And as a result, the computer does not see the desired point - it works with another on one channel.

Quite recently, I again encountered this problem, but this time I did not have access to the point, but I wanted to use the Internet very much (from the entertainment at home there was only a persimmon and the book "Western Philosophy from the Beginnings to the Present Day"). So I decided to try setting up wi-fi from the computer side.

In the adapter settings, I changed the "Scan the allowable interval to the minimum value" parameter and everything worked (control panel → Network and Sharing Center → Network and Sharing Management → Wireless Network Management → Adapter Properties → Configure → Advanced).

This parameter is responsible for the air scan interval to search for new wi-fi connections. In my case, up to this point, the connection to the point has already been established, the "Connect automatically if the network is within range" checkbox is selected in the settings (control panel → Network and Sharing Center → Network and Sharing Management → Wireless Networks Management (Properties right-click on the connection you need)). Accordingly, scanning the air every 20 seconds gives more chances that the computer will see the desired point and immediately establish a connection with it. This is what happened.

And a little about other options:

Transmit buffer, Receive buffer. The value of this parameter allows you to specify the size of the buffer that stores the data packets received from the network. On the Internet, in various forums, it is advised to set these values to the maximum, unless, of course, you have a weak computer (in which case, I would advise you to buy a new one).

Preamble 802.11b (Preamble 802.11b). A sequence of binary bits that help synchronize receivers and prepare the reception of transmitted data. I am connecting to an access point with an 802.11n radio type, so I set this value to LongOnly. If you have any problems in this mode, then set the default value.

Network address (Networkadress). The MAC address of the configured software interface. Manufacturers themselves set this value unique, but if you are hiding from someone, you can change it.

And further. On the "Power Management" tab, I unchecked the "Allow this device to be turned off to save energy" checkbox, anyway, the battery on the laptop has already died long ago.

We have already considered solutions to many problems that may arise when connecting a laptop to a Wi-Fi network, or during use. But, there is one popular problem that I have not yet written about. This is when the laptop does not see the Wi-Fi network. In principle, the problem applies not only to laptops, but also to stationary computers that are connected to Wi-Fi via an adapter (external, or internal)... The problem when the laptop does not see Wi-Fi can be encountered in Windows XP, Windows 7, Windows 8, and even in Windows 10. If you have Windows 10 installed, and the computer does not see your router, then see a separate instruction:. Since the solutions there are practically the same, it does not matter which system your laptop is running on. Now we will try to figure out why the laptop does not see wireless networks, using the example of Windows 7.

Before moving on to any settings, let's try to figure out what problem you have specifically. There are two options:

When no Wi-Fi networks are displayed in the list of available networks for connection. That is, the computer does not find Wi-Fi at all. But, you are sure that there are wireless networks in the radius. Other devices see them.
And when the laptop does not see only your Wi-Fi network, and sees others, neighboring networks.

I will divide this article into such two parts. You can immediately skip to the required section with the solution to your problem.

Another important point. If you have an error on your computer "No connections available", and a red cross next to the Wi-Fi connection icon, then there is a separate one for solving this error.

Why can't my laptop see wireless networks (none)?

The laptop does not see my Wi-Fi, while others can see it. Solution.

If above we considered the situation when wireless networks are not displayed at all on a laptop, now we will figure out why the laptop does not see only one Wi-Fi network we need. And other networks, neighboring ones, are displayed in the list of available ones. This problem appears more often on mobile devices: smartphones and tablets. But computers are no exception.

In this case, the problem already needs to be looked for on the side of the Wi-Fi router. Almost always, the solution is the same: change of the Wi-Fi network channel... If the router itself, or you manually set a static 13 channel in the settings, then the computer will most likely not see the network. Therefore, you need to check and change the channel in the router settings. How to change the channel on different routers, I wrote in the article:

For example, changing the channel to Tp-Link. You can change it in the settings, on the Wireless tab (Wireless Mode)... Try to put a static channel (just don't put 12 and 13), or set Auto.

If it does not help, then you can still change the name of the Wi-Fi network. You can also do this in the settings, on the tab with the wireless network settings.

Another tip: try moving your laptop closer to the router, or vice versa. Perhaps this is the problem. There are often times when Wi-Fi catches in general near the router, but does not work at a short distance. This is certainly not normal, but I do not know of any specific solution. Again, you need to try experimenting with channels.

The problem of incorrect display or complete absence of available wifi networks is quite common and affects not only laptops, but also stationary computers, tablets, smartphones, etc.

Why doesn't wifi work on my laptop?

To begin with, it is worth analyzing the most common scenario - complete "ignoring" by the computer of all wireless networks. Those. Are you sure that:

- the router normally distributes a signal and the access point is "open" for connection;
- there are other available wifi networks nearby;
- other devices (for example, a cell phone) easily detect active sources of a wireless signal.

But at the same time, your laptop does not find a single wifi network and does not connect to the Internet - i.e. Wi-fi on the laptop stopped working altogether.

1. To solve this problem, first of all, it is worth checking if the "wireless network adapter" is enabled at all. For this:

- open the "Device Manager", in the "device tree" select "Network adapters";
- in the list that opens, there should be an adapter for your wireless network (the name of which depends on the model of the device and you can clarify this parameter in the documentation for the laptop);

- there should not be a triangular yellow icon with an exclamation mark next to the adapter name - it means that the wireless network adapter is disabled, or the network driver installed and used by the laptop does not work correctly;
- to click on it with the right mouse button and click "Enable / Connect";
- if the driver does not work correctly - download and install the current version of the program for your laptop. Or remove the device through the "Device Manager" (first download the required driver - for safety reasons) and restart the PC - the adapter should appear automatically.

2. Perhaps the laptop does not see the Wi-Fi due to the fact that the network is disabled by a keyboard shortcut or a special switch on the case: for laptop owners, this reason is most relevant.

3. If the laptop stopped seeing wifi after the device was disassembled (to clean the upgrade from dust), then it is possible that the wireless module was physically disconnected during the disassembly or the integrity of the connection wires was broken. In this case, the solution to the problem, accordingly, will be to connect the adapter (and in the event of a physical malfunction, replace it with a working module).

Why does the laptop not see wifi, but other devices see the router?

So, there is a certain network that works and is displayed on other devices, but the laptop with great persistence does not want to see it. You can do the following:

This applies directly to the computer, however, the culprit for the fact that the laptop does not see the Wi-Fi router may be the source of the wireless signal itself.

- check the relevance of the installed firmware on the router: if the firmware is outdated, then, accordingly, update it to the most recent version;
- reset the router configuration to the default value (factory settings) and reconfigure the router;
- in some cases, installing an older version of the firmware helps, with setting up the network configuration and then updating the firmware.

Thus, the most relevant and effective solution to the problem "the laptop is not looking for Wi-Fi" is to check the functionality of the wifi module and install the latest drivers.

To avoid such a problem, it is worth regularly (manually or using special programs).

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