Why Wi-Fi won't connect on my computer, but works on other devices: A complete diagnostic

The situation is familiar to many: the router distributes the Internet to a smartphone, tablet and even a smart TV, but here A desktop PC or laptop stubbornly refuses to connect to Wi-Fi.The problem can manifest itself in various ways: the network isn't detected at all, the password isn't accepted, or the connection keeps dropping. Is it due to poor network performance, faulty hardware, or a devious Windows setting?

In practice, in 90% of cases, it is the fault of software glitches, not hardware failures. And if you're reading this article on the same computer that's not getting Wi-Fi (via mobile data or Ethernet), the chances of fixing the problem yourself are very high. We'll examine all possible causes—from a simple disabled adapter to exotic driver conflicts—and give you some insight. step-by-step instructions with pictures and commands, which will work even for beginners.

But before you dig into the settings, answer one question:

═══

1. Check the basic settings: what could have "fallen off" on its own?

Start with the obvious—sometimes a problem can be solved with just one click. Here's what to do. first of all:

• 🔄 Restart your router and computerUnplug the router for 30 seconds, then plug it back in. This will clear the DHCP cache and any temporary errors.
• 📶 Make sure Wi-Fi is enabled on your PC.Laptops often have a physical button or key combination (e.g. Fn + F2 on ASUS or Lenovo). On desktop PCs, check if the indicator on the Wi-Fi adapter is lit.
• 🔍 See if Windows can see other networksIf the list of available networks is empty, the problem is with the adapter. If you see neighboring networks but not yours, the issue is with the router or its settings.

If the network appears after rebooting the router, the problem was in frozen DHCP server router. This is a common story for budget models like TP-Link TL-WR840N or D-Link DIR-300If not, we move on.

2. Diagnosing the Wi-Fi adapter: is it working at all?

If the computer doesn't see not a single one If you have a wireless network, the problem is most likely with the adapter. Here's how to check:

1. Click Win + X and select "Device Manager".
2. Expand the section Network AdaptersLook for devices with words Wireless, Wi-Fi or 802.11 (For example, Intel Wi-Fi 6 AX200 or Qualcomm Atheros QCA9377).
3. If the light next to the adapter is on yellow exclamation mark — the driver isn't working properly. If the adapter isn't present at all, it's either disabled or faulty.

To enable the adapter:

1. Right click on it → "Activate device".
2. If the option is not active, try Update Driver (select automatic search).

What if the adapter is not on the list?

If there is no Network Adapters section in Device Manager, or it only shows the Ethernet controller, this may mean:

- The Wi-Fi module is physically disconnected (on laptops, check the cover on the bottom - sometimes the module falls out when dropped).

- The adapter burned out (a common problem after power surges).

- The controller is disabled in the BIOS. Wireless LAN (you need to go into BIOS and enable it in the section Advanced → Onboard Devices).

Critical point: if the adapter is in the list, but the networks are still not visible, try connecting an external USB Wi-Fi adapter (for example, TP-Link TL-WN725N). If the network appears with it, the problem is in the main module.

3. Driver Conflicts: Why Windows Doesn't Get Along with Wi-Fi

Drivers are the most common cause of Wi-Fi problems on Windows. The system may install outdated or incompatible version, especially after major updates (for example, after switching from Windows 10 on Windows 11).

How to check and update the driver correctly:

• 🔧 Uninstall the current driver:
  1. In the Device Manager, right-click on the adapter → "Remove device".
  2. Check the box "Delete the driver software for this device" (if any).

🔄 Restart your PC — Windows will try to install the driver automatically.

📥 If the network does not work, download the driver from the manufacturer's website:

• For laptops: search on the website Dell, HP, Lenovo etc. according to the device model.
• For discrete adapters: on the website Intel (For AX200/AX210), Qualcomm (For Atheros), Realtek (For RTL8821CE).

Uninstalled the old driver by checking the "Uninstall programs" box | Restarted the computer | Downloaded the driver from the official website (not from the driver pack!) | Installed the driver in compatibility mode (if Windows 11) -->

⚠️ Attention: Never use driver packs like DriverPack Solution or SlimDriversThey often install incompatible or malicious versions of drivers, which can completely break the network.

4. Router settings: why is it “ignoring” your PC?

If other devices connect to Wi-Fi but your computer doesn't, the problem may be router settingsHere's what to check:

Router parameter	What could go wrong	How to fix
Wi-Fi operating mode (802.11 b/g/n/ac/ax)	The router is operating in the mode 802.11ac, and the old adapter only supports 802.11n.	In the router settings (usually 192.168.0.1 or 192.168.1.1) select mixed mode 802.11 b/g/n.
Channel width (20/40/80 MHz)	Width 80 MHz may not be supported by older adapters.	Install 20/40 MHz in the wireless network settings.
MAC address filtering	The router has a "whitelist" of devices enabled, but your PC's MAC address is not included in it.	Disable filtering or add the MAC address of the adapter (you can find it out using the command ipconfig /all V CMD).
Hidden network (SSID)	If the broadcast SSID is disabled in the router, Windows will not see the network.	Turn on network visibility or connect manually through Network Management.

⚠️ Attention: If you recently changed the Wi-Fi password on your router but haven't updated it on your PC, Windows may be trying to connect with the old password. Remove the network from the list of saved networks. (Settings → Network & Internet → Wi-Fi → Manage known networks) and reconnect.

5. Windows Problems: Services, Protocols, and System "Crutches"

Windows is notorious for its networking glitches. Here's what could go wrong:

• 🛑 WLAN AutoConfig service is disabled:
  1. Click Win + R, enter services.msc.
  2. Find WLAN AutoConfig Service (WLAN AutoConfig).
  3. Right click → "Launch" and set the startup type "Automatically".
• 🔧 Network settings have been reset:

  netsh winsock reset
  netsh int ip reset
  ipconfig /flushdns

  Enter these commands in CMD as administrator and restart your PC.

• 🔄 IPv4/IPv6 protocol conflict:
  1. Open Control Panel → Network Connections.
  2. Right-click on Wi-Fi → "Properties".
  3. Uncheck the box Internet Protocol Version 6 (TCP/IPv6) and leave only IPv4.

If after resetting the settings the network works, but after a while it disappears again, it is the fault conflict with antivirus or VPNTry disabling it temporarily. Kaspersky, Avast or NordVPN and check the connection.

6. Hardware problems: when the hardware is to blame

If you have tried all software methods and Wi-Fi still does not work, it may be due to physical malfunctionHere are typical scenarios:

• 🔌 Problems with the USB port (for external adapters): Try connecting the adapter to a different port or to a different PC.
• 📡 Damaged antennas (on laptops): If the signal disappears when the screen moves, the antenna cable may have come loose from the Wi-Fi module.
• ⚡ Burnt adapter: If after a thunderstorm or power surge both Wi-Fi and Ethernet stop working, the network controller has most likely burned out.

How to check antennas on a laptop:

1. Remove the back cover (on most models it is secured with latches).
2. Locate the Wi-Fi module (usually next to the SSD, looks like a small board with two antenna wires).
3. Check that the antennas are connected tightly (they should sit without any play).

⚠️ Attention: If you are not confident in your skills, do not disassemble the laptop yourself - contact a service center. On models MacBook or Lenovo Yoga The Wi-Fi module may be hidden under the battery, and careless handling will damage the cables.

7. Exotic reasons: when nothing helps

If you've read this far and the problem persists, consider these rare but possible causes:

• 🕵️ Virus or malware: some Trojans (for example, DNSChanger) are blocking network connections. Check your system. Malwarebytes or Kaspersky Virus Removal Tool.
• 🔒 Windows Security Policy: in enterprise versions of Windows (for example, Windows 10 Pro (with domain policies) Wi-Fi access may be blocked. Check gpedit.msc → Computer Configuration → Administrative Templates → Network → Network Connections.
• 🌐 Conflict with VPN or proxy: if you use OpenVPN, WireGuard or configured the proxy manually, reset the settings through Settings → Network & Internet → Proxy.
What to do if Wi-Fi works but there is no internet access?

If you have a network connection, but the pages won't open:

1. Check if the PC receives an IP address (enter ipconfig V CMD - line IPv4 address must be filled in, for example, 192.168.1.100).

2. If the IP starts with 169.254.x.x — DHCP isn't working. Manually enter the IP (for example, 192.168.1.100), mask 255.255.255.0, gateway 192.168.1.1 and DNS 8.8.8.8.

3. If the ping to the router (ping 192.168.1.1) works, but there is no internet - the problem is in the router settings (check your connection to your provider).

FAQ: Frequently asked questions about Wi-Fi issues on PCs

Why does Wi-Fi work on my phone but not on my computer?

This is a sign of a problem with PC Wi-Fi adapter or its drivers. The phone connects via a different protocol (for example, 802.11ac), and the computer can only support 802.11nConflicts with router settings (for example, MAC filtering or a hidden SSID) are also possible.

How do I know what Wi-Fi adapter I have?

Open device Manager (Win + X → Device Manager), expand the section Network AdaptersThe adapter name will contain the words Wireless, Wi-Fi or the chip model (for example, Intel AX200, Realtek RTL8821CE).

Can antivirus block Wi-Fi?

Yes, some antiviruses (for example, Kaspersky Internet Security or Avast Premium) have a built-in firewall, which may be blocking connections. Try temporarily disabling protection or adding the network to the exceptions list.

What should I do if Wi-Fi disappears after a Windows update?

Windows updates often reset drivers. Revert to the old driver version:

1. Open device Manager.
2. Right-click on the Wi-Fi adapter → "Properties" → tab "Driver".
3. Click Rollback (if the button is active) or "Remove device", then restart your PC.

If the rollback doesn't help, download the driver from the laptop/adapter manufacturer's website.

How do I connect to Wi-Fi if my computer can't see it?

If the network is hidden or the adapter is not working properly, connect manually:

1. Open Control Panel → Network and Internet → Network and Sharing Center.
2. Select Setting up a new connection → Connecting to a wireless network manually.
3. Enter the network name (SSID), security type (WPA2-Personal) and password.

If this doesn't help, check if Wi-Fi is enabled in BIOS (Advanced → Onboard Devices → Wireless LAN).