Why doesn't my computer connect to Wi-Fi, but my phone connects fine?

A laptop or desktop computer does not see Wi-Fi, although a smartphone connects to the same network without delays - the problem can manifest itself in different ways: from a complete absence of networks in the list to errors like "Unable to connect" or Limited AccessThe most common culprits are network card drivers (especially after a Windows update), a disabled adapter in Device Manager, incompatible router settings (for example, the 802.11ac standard on older PCs), or hardware issues with the antenna—and the user's first priority is to check these issues before blaming the ISP.

In this article we will look at 12 most common reasons, Why Windows 10/11 There's no Wi-Fi signal, while other devices are working reliably. You'll learn how to diagnose the problem using the system's built-in tools, which router settings may be blocking your PC's connection, and what to do if the network adapter or driver is at fault. We'll pay special attention to hidden parameters, which are often overlooked even by experienced users.

Before you take any action, answer two questions: 1. Does the computer see other Wi-Fi networks (for example, neighbors)? 2. Did the problem appear suddenly or has the PC never connected to this router?

The answers will help narrow down the possible causes.

1. Problems with the Wi-Fi adapter driver

In 60% of cases, the driver is to blame—it could have crashed after an update. Windows, conflict with other programs, or simply become outdated. This is especially true for laptops with adapters. Intel, Realtek or Broadcom, where manufacturers regularly release patches to fix connection errors.

How to check:

Open device Manager (keys Win + X → select the menu item). Expand the branch Network adapters and find the device with the words Wireless, Wi-Fi or 802.11If there is a yellow exclamation mark next to it, the driver is not working properly.

• 🔧 Update the driver manually: Right-click on the adapter → Update driver → Automatic search. If Windows does not find updates, download them from the website of the laptop or adapter manufacturer (for example, for Intel AX200 - With Intel's official page).
• 🗑️ Uninstall the current driver: Right click → Remove device → Restart your PC. The system will reinstall the driver the next time you turn it on.
• ⏳ Roll back to the old version: If the problem appeared after the update, select Properties → tab Driver → Roll back.

For adapters Realtek (especially models RTL8188EE, RTL8723DE) often helps Manual driver installation from the manufacturer's website, and not through Windows UpdateAutomatic system updates often install generic drivers that don't take into account the specific features of a specific model.

2. The Wi-Fi adapter is disabled either physically or software-wise.

Sometimes the adapter is simply turned off—this can happen after the laptop overheats, a power outage, or accidental key presses. There are several ways to check its status:

• 💻 Button on the body: On some laptops (eg. Lenovo, HP) there is a separate key or switch to turn Wi-Fi on/off. It is often combined with F2–F12 (antenna icon). Click Fn + F{number}.
• ⚙️ In Windows settings: Go to Settings → Network and Internet → Wi-Fi and make sure the slider is in position On.
• 🔌 In BIOS/UEFI: It's rare, but it can happen that the adapter is disabled at the motherboard level. Go to the BIOS (usually the key Del or F2 when booting) and check the section Advanced → Onboard Devices.

If the adapter is disabled in Device Manager (gray arrow icon), right-click on it and select Engage.

3. Incompatibility of Wi-Fi standards (802.11a/b/g/n/ac/ax)

Modern routers support several wireless standards, but not all devices can work with all modes. For example, older adapters (pre-2015) often do not support 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6), and new routers can only use these standards by default for maximum speed.

How to check:

Go to your router settings (usually at 192.168.0.1 or 192.168.1.1, login/password see on the sticker) and find the section Wireless Settings or Wi-Fi ModeIf it's there 802.11ac only or 802.11ax only, change to 802.11n/ac/ax mixed or 802.11b/g/n.

A critical detail: if your adapter only supports 2.4 GHz and your router is configured for 5 GHz (or vice versa), you won't be able to connect. Check the band settings in your router's control panel.

4. MAC address filtering in a router

Many users enable filtering by MAC address to enhance security, but they forget to add the new PC to the list of allowed devices. As a result, the router simply ignores connection requests from unknown adapters.

How to check: 1. Find out MAC address your Wi-Fi adapter:

- Open it. Command line (Win + R → enter cmd → Enter).

- Enter the command:

ipconfig /all

Find the line Physical address for the adapter Wireless network (example: 00-1A-2B-3C-4D-5E).

2. Add it to the list of allowed devices in the router settings (section MAC Filtering or White list).

How to find MAC address on Android/iPhone?

On Android: Settings → About phone → General information → Wi-Fi MAC addressOn . iPhone: Settings → General → About → Wi-Fi Address.

If filtering is disabled but the problem persists, check if the mode is enabled Isolation of clients (or AP Isolation). It blocks data exchange between devices on the same network, which can interfere with the connection.

5. Incorrect IP or DNS settings

Sometimes Windows can't get the correct one IP address from the router (for example, due to a failure DHCP), or uses incorrect DNS servers, which results in the "No Internet Access" error or no network at all.

How to fix: 1. Reset network settings:

- Open it. Command line on behalf of the administrator.

- Run the commands one by one:

netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns

- Restart your PC.

2. Configure IP manually:

- Go to Control Panel → Network and Internet → Network and Sharing Center → Change adapter settings.

- Right click on Wireless network → Properties → Internet Protocol version 4 (TCP/IPv4) → Properties.

- Install:

- IP address: 192.168.1.X (where X is a number from 2 to 254, not occupied by other devices).

- Subnet mask: 255.255.255.0.

- Main gateway: 192.168.1.1 (or 192.168.0.1, look at the router sticker).

- DNS: 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).

Make sure DHCP is enabled on your router.

Check that your PC's IP address does not conflict with other devices.

Try connecting with a manual IP

Flush DNS cache (ipconfig /flushdns)

-->

If the Internet works after manual setup, the problem was in DHCP server Router. Try rebooting the router or updating its firmware.

6. Wi-Fi interference or weak signal

A phone can connect to Wi-Fi even with a weak signal, while a PC requires a more stable connection. Reasons for signal degradation include:

- Channel congestion (many neighbors are using the same channel).

- Physical barriers (walls, furniture, household appliances).

- Interference from other devices (microwaves, cordless phones, Bluetooth speakers).

How to improve the signal: 1. Change Wi-Fi channel:

- In the router settings (Wireless Settings) select the channel manually (for example, 6 or 11 for 2.4 GHz). Use utilities like Wi-Fi Analyzer (on your phone) to find the least crowded channel.

- For 5 GHz, select channels 36, 40, 44 or 48 - They are usually freer.

2. Reduce the transmit power:

- In some routers (for example, ASUS, TP-Link) there is an option Transmit PowerTry lowering it to 75% or 50% - This can reduce interference.

3. Use a repeater or mesh system:

- If the signal is weak in remote rooms, install repeater (For example, TP-Link RE605X) or go to Mesh system (Google Nest Wi-Fi, ASUS ZenWiFi).

To diagnose signal strength on a PC:

- Open it. Command line and enter:

netsh wlan show interfaces

- Pay attention to the line SignalIf the value is lower 50%, the signal is too weak.

7. Conflict with antivirus or firewall

Some antiviruses (for example, Kaspersky, Avast, ESET) block network connections if they consider them suspicious. The built-in Windows Firewall.

How to check: 1. Temporarily disable your antivirus:

- Right-click on the antivirus icon in the tray and select Suspend protection or Disable.

- Try connecting to Wi-Fi. If it works, add the network to your antivirus exclusions.

2. Check Windows Firewall:

- Open it. Control Panel → Windows Firewall → Allow an app to interact with the app.

- Make sure the boxes for your network are checked Private And Public against Network discovery.

⚠️ Attention: If Wi-Fi works again after disabling your antivirus, don't leave it disabled for too long. Add the network to the exceptions list or update your antivirus databases—the false positive may be due to outdated signatures.

For Kaspersky Internet Security:

- Go to Settings → Advanced → Network.

- In the section Network activity management add your network to Trusted.

8. Windows services crash

For Wi-Fi operation in Windows Several system services are responsible. If even one of them is not running, the connection will be impossible. The most common culprits are:

- WLAN Automatic Configuration Service (WLAN AutoConfig),

- Network connections (Network Connections),

- DHCP client.

How to fix: 1. Open Services (Win + R → enter services.msc → Enter). 2. Find the listed services and check:

- Launch type: must be Automatically,

- State: should be In progress.

3. If the service is stopped, right-click → Launch.

If the services do not start, try restoring system files:

- Open it. Command line on behalf of the administrator.

- Enter:

sfc /scannow
dism /online /cleanup-image /restorehealth

- Restart your PC.

⚠️ Attention: If after checking sfc /scannow If you see the message "Windows Resource Protection found corrupt files but couldn't fix some of them," try restoring your system from a restore point or reinstalling Windows with saving files.

FAQ: Frequently asked questions about the problem

My PC sees other networks, but not mine. What's wrong?

Most likely your network operates in the range 5 GHz, and the PC adapter only supports 2.4 GHz (or vice versa). Go to your router settings and enable support for both ranges (2.4 GHz + 5 GHz). Also check if it is hidden SSID your network (there should be a checkbox in the router settings Broadcast SSID or Broadcast network name).

The Wi-Fi connects, but the internet isn't working. What should I do?

This is a typical problem with IP or DNS. Try: 1. Reset network settings (see section 5). 2. Prescribe DNS manually: 8.8.8.8 And 8.8.4.4 (Google) or 1.1.1.1 (Cloudflare). 3. Check if your internet provider is blocking MAC address (sometimes they only link access to one device).

Wi-Fi disappeared after a Windows update. How can I get it back?

Updates often break drivers. Try the following: 1. Roll back the adapter driver (see section 1). 2. Download the latest driver from the laptop/adapter manufacturer's website (do not use Windows Update). 3. If it doesn't help, roll back the system to a restore point (Control Panel → Recovery → Open System Restore).

The router returns an authentication error when connecting a PC. What is this?

An authentication error means the router refuses to accept the password from the PC. Reasons:

- Incorrect password (check the case of the characters!).

- Incompatibility of security standards (for example, the router uses WPA3, and the adapter only supports WPA2).

- On MAC filter (see section 4).

Solution: Change the security type in your router settings to WPA2-PSK (AES) - This is the most universal mode.

Can a virus block Wi-Fi?

Yes, some viruses (such as Trojans or rootkits) can modify network settings or block internet access. Run a full system scan. Malwarebytes or Dr.Web CureIt!. Also check the file hosts (path: C:\Windows\System32\drivers\etc\hosts) - there should be no extraneous entries after the line 127.0.0.1 localhost.