A Wi-Fi adapter that suddenly stops working can prevent your Windows PC or laptop from connecting to the internet. The problem may appear as a missing Wi-Fi option, an adapter that shows a warning icon in Device Manager, frequent disconnections, or a message saying that no wireless networks are available.
Fortunately, most Wi-Fi adapter problems can be fixed without replacing the hardware. In this guide, you’ll learn practical ways to troubleshoot and fix a Wi-Fi adapter not working in Windows, starting with simple solutions and progressing to more advanced repairs.
Common Symptoms of a Wi-Fi Adapter Problem
Before troubleshooting, identify how the problem appears. Common symptoms include:
- Wi-Fi does not appear in Windows Settings.
- The computer cannot detect wireless networks.
- The Wi-Fi adapter is missing from Device Manager.
- A yellow warning icon appears next to the wireless adapter.
- Windows reports that the adapter is disabled.
- Wi-Fi stopped working after a Windows update.
- The wireless connection repeatedly disconnects.
- Ethernet works, but Wi-Fi does not.
- The adapter shows an error such as Code 10 or Code 43.
- Other devices can connect to the same Wi-Fi network normally.
Knowing the symptom can help determine whether the problem is related to Windows, drivers, network settings, or the physical adapter.
1. Restart Your Computer
Start with the simplest solution.
Save your work, restart Windows, and try connecting to Wi-Fi again. A temporary driver or system-service problem can sometimes prevent the adapter from initializing correctly.
If you’re using a USB Wi-Fi adapter, disconnect it before restarting and reconnect it after Windows loads.
2. Check Whether Wi-Fi Is Turned On
Windows may have Wi-Fi disabled even though the adapter itself is working.
Go to:
Settings → Network & internet → Wi-Fi
Make sure Wi-Fi is enabled.
On some laptops, wireless networking can also be controlled by a physical switch or keyboard shortcut. Look for a key with a wireless or airplane icon and make sure wireless connectivity has not been disabled.
Also check Airplane mode and turn it off if necessary.
3. Enable the Wi-Fi Adapter in Network Connections
The adapter may be installed correctly but disabled in Windows.
Press Windows + R, type:
ncpa.cplPress Enter.
Find your wireless connection. If it is marked Disabled, right-click it and select Enable.
Wait several seconds and check whether available Wi-Fi networks appear.
4. Check the Wi-Fi Adapter in Device Manager
Device Manager is one of the most useful tools for diagnosing wireless adapter problems.
Right-click the Start button and select Device Manager.
Expand:
Network adapters
Look for an entry containing terms such as:
- Wireless
- Wi-Fi
- WLAN
- 802.11
- Intel
- Realtek
- MediaTek
- Qualcomm
If you see a yellow warning icon, Windows has detected a problem with the device or its driver.
If the adapter is disabled, right-click it and choose Enable device.
What If the Adapter Is Missing?
If the Wi-Fi adapter does not appear under Network adapters, select:
View → Show hidden devices
You can also select:
Action → Scan for hardware changes
If the adapter remains missing, the issue could involve a missing driver, BIOS/UEFI configuration, Windows hardware detection, or a physical hardware problem.
5. Restart the WLAN AutoConfig Service
Windows relies on the WLAN AutoConfig service to manage wireless network connections.
Press Windows + R, enter:
services.mscFind WLAN AutoConfig.
Right-click it and select Restart.
Then open its properties and make sure Startup type is set appropriately, typically Automatic.
Try connecting to Wi-Fi again after restarting the service.
6. Update the Wi-Fi Adapter Driver
An outdated, corrupted, or incompatible driver can cause the Wi-Fi adapter to stop working.
In Device Manager:
- Expand Network adapters.
- Right-click your wireless adapter.
- Select Update driver.
- Choose Search automatically for drivers.
- Install an available driver.
- Restart your computer.
For the most reliable driver, you can also visit your laptop or motherboard manufacturer’s official support website and download the wireless driver specifically designed for your Windows version and hardware.
Avoid downloading drivers from unknown third-party websites.
7. Roll Back the Wi-Fi Driver
If Wi-Fi stopped working immediately after a driver update, the new driver may be incompatible.
Open Device Manager and right-click the Wi-Fi adapter.
Select:
Properties → Driver → Roll Back Driver
If the option is available, follow the instructions and restart Windows.
This can be particularly useful when a previously stable wireless connection breaks after an automatic driver or Windows update.
8. Reinstall the Wi-Fi Adapter Driver
If updating or rolling back the driver doesn’t help, reinstalling it can remove corrupted driver files.
In Device Manager:
- Right-click the Wi-Fi adapter.
- Select Uninstall device.
- Confirm the removal.
- Restart Windows.
Depending on your hardware and Windows configuration, the operating system may automatically reinstall the driver.
If it doesn’t, install the correct driver downloaded from your PC or adapter manufacturer’s official support page.
Important: If your computer has no internet connection, download the driver using another device and transfer it with a USB drive, or temporarily use Ethernet if available.
9. Run the Windows Network Troubleshooter
Windows includes troubleshooting tools that can automatically identify certain network configuration problems.
Open:
Settings → System → Troubleshoot → Other troubleshooters
Look for the available network-related troubleshooter and follow the on-screen instructions.
Although automated troubleshooting cannot fix every Wi-Fi problem, it can identify common configuration and connectivity issues quickly.
10. Forget and Reconnect to the Wi-Fi Network
Sometimes the adapter works correctly but the saved wireless profile has become corrupted.
Open:
Settings → Network & internet → Wi-Fi → Manage known networks
Select your Wi-Fi network and choose Forget.
Then return to the Wi-Fi menu, select the network, enter the password again, and reconnect.
This creates a fresh wireless connection profile.
11. Reset Network Settings
If several network troubleshooting steps fail, Windows’ network reset feature can restore networking components to their default configuration.
Go to:
Settings → Network & internet → Advanced network settings → Network reset
Select Reset now and restart the computer when prompted.
Keep in mind that a network reset can remove saved network information and reset network adapters, so you’ll need to reconnect to wireless networks afterward.
12. Reset the Network Stack Using Command Prompt
Corrupted network components can sometimes cause wireless connectivity problems.
Open Command Prompt as administrator and run these commands one at a time:
netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdnsRestart Windows after completing the commands.
These commands reset several networking components and refresh your IP and DNS configuration.
13. Disable Wi-Fi Adapter Power Saving
Windows may turn off the wireless adapter to reduce power consumption.
Open Device Manager, right-click the Wi-Fi adapter, and select:
Properties → Power Management
If available, uncheck:
Allow the computer to turn off this device to save power
Click OK and restart the computer.
This can be especially useful if Wi-Fi works initially but disappears after the PC wakes from sleep or remains idle for a while.
14. Check Windows Update
A Windows update can sometimes fix wireless driver and compatibility problems.
Go to:
Settings → Windows Update
Select Check for updates and install applicable updates.
Also check Advanced options → Optional updates → Driver updates if available. A wireless driver update may be listed there.
However, if the Wi-Fi problem began immediately after a Windows update, consider rolling back the affected driver or update rather than installing additional changes blindly.
15. Check BIOS/UEFI Wireless Settings
If the Wi-Fi adapter is completely missing from Windows, check whether wireless networking is disabled in the computer’s BIOS/UEFI firmware.
Restart the PC and enter the firmware setup using the manufacturer’s designated key, which may be F2, Delete, F10, F12, or another key.
Look for settings related to:
- Wireless LAN
- WLAN
- Internal wireless
- Network devices
Make sure the wireless device is enabled.
BIOS/UEFI menus vary considerably between manufacturers, so avoid changing unrelated settings.
16. Test the Adapter on Another Computer
If you’re using a USB Wi-Fi adapter, connect it to another computer.
If the adapter works normally on the second computer, the original PC may have a Windows, driver, or configuration problem.
If the adapter fails on multiple computers, the hardware itself may be defective.
For an internal laptop Wi-Fi card, hardware diagnosis is more complicated and may require professional assistance.
17. Check for Hardware Failure
If you’ve tried the software solutions above and Windows still cannot detect the Wi-Fi adapter, hardware failure becomes more likely.
Potential causes include:
- Failed wireless card
- Loose internal connection
- Damaged USB adapter
- Physical damage
- Overheating
- Motherboard-related problems
Before replacing hardware, verify that the correct driver is installed and that the adapter isn’t disabled in Windows or BIOS/UEFI.
What to Do If Wi-Fi Works but Is Extremely Slow
A Wi-Fi adapter doesn’t necessarily have to completely stop working to have a problem.
If Wi-Fi connects but performs poorly, try:
- Restarting the router and PC.
- Updating the wireless driver.
- Moving closer to the router.
- Testing the 2.4 GHz and 5 GHz networks separately.
- Removing unnecessary saved wireless profiles.
- Checking for interference.
- Testing the connection with another device.
- Updating router firmware if appropriate.
If every device on the network experiences slow speeds, the problem may be with the router or internet connection rather than the PC’s Wi-Fi adapter.
How to Identify the Most Likely Cause
A quick diagnosis can save time:
| Problem | Likely Cause |
|---|---|
| Wi-Fi option completely missing | Disabled adapter, driver, or hardware |
| Yellow icon in Device Manager | Driver or device error |
| Adapter disappeared after update | Driver compatibility |
| Wi-Fi disconnects during sleep | Power management |
| Other devices connect normally | PC-specific problem |
| Wi-Fi fails on multiple computers | Adapter or network hardware |
| Ethernet works but Wi-Fi doesn’t | Wireless adapter/configuration |
| Wi-Fi connects but has poor speed | Signal, interference, driver, or router |
Frequently Asked Questions
Why is my Wi-Fi adapter not showing up?
A missing adapter can be caused by a disabled device, missing or corrupted drivers, BIOS/UEFI settings, Windows hardware detection problems, or hardware failure.
How do I reset my Wi-Fi adapter?
You can disable and re-enable it through Network Connections or Device Manager. For more serious configuration problems, use Windows’ Network reset feature.
Can a Windows update break Wi-Fi?
Yes. Driver or system changes introduced by an update can occasionally cause compatibility problems. Rolling back the wireless driver can help if the problem began immediately after an update.
Should I uninstall my Wi-Fi driver?
If the driver is corrupted or malfunctioning, uninstalling it and reinstalling the correct manufacturer-provided driver can resolve the issue.
How do I know if my Wi-Fi adapter is broken?
If the adapter isn’t detected after reinstalling the correct driver, checking Windows settings, and testing the hardware where possible, physical failure becomes more likely.
Final Thoughts
A Wi-Fi adapter not working in Windows can be caused by something as simple as a disabled connection or as serious as hardware failure. The best approach is to troubleshoot systematically.
Start by checking Wi-Fi and Airplane mode, then inspect the adapter in Device Manager. Next, restart WLAN AutoConfig, update or reinstall the driver, reset network settings, and investigate power-management settings. If Windows cannot detect the adapter even after these steps, check BIOS/UEFI settings and consider the possibility of hardware failure.
In most cases, identifying whether the problem is caused by Windows settings, the wireless driver, network configuration, or hardware makes the solution much easier to find.
