WiFiCx.sys is a Windows WiFi Class Extension Driver that is a legitimate Windows component of WiFi devices on your computer. But, recently a handful of users on Windows 11 have complained of multiple occurrences of Blue Screen of Death issues due to the WiFiCx.sys file. Generally, a human interface device or an HID is responsible for this issue. So, just removing/uninstalling the device on your computer should resolve the situation.
Fix 1 – Remove Human Interface Devices
In most cases, the Human Interface Devices that you have plugged into your system cause conflict and create this problem.
Human Interface Devices include any accessories that you have plugged into your system. Yes, this also includes any mouse, keyboard, headphones, or speakers connected to the system.
1. Disconnect an HID (suppose the speakers) from your computer.
2. Then, press the Windows key+X keys together.
3. Next, tap “Device Manager” on the context menu to open that.
4. Now, inside this Device Manager, look for the driver that you have just detached.
Suppose, you have detached the speakers from your system. So, look for the speaker device in the list.
5. Once you have identified that, right-tap it and tap “Uninstall device“.
Now, do the action that has prompted the BSOD issue.
This way, remove and uninstall all the device drivers one by one by repeating the steps to identify the culprit device.
Multiple users have recommended uninstalling the WiFi or all the network adapters from your system. So, try to uninstall those drivers and restart the system.
Fix 2 – Run Driver Verifier for non-MS drivers
You can run the driver verifier over the non-Microsoft driver to scan and identify any faulty driver.
1. Just press the Windows key+R keys together to launch the Run box.
2. Then, write this in the box and hit Enter.
3. On the first page, click on the “Create custom settings (for code developers)” option.
4. Then, tap “Next” to proceed.
5. Now, you will notice a list of tests has appeared.
6. Next, check all the tests except the “Randomized low resources simulation” test.
7. Finally, tap “Next“.
8. On the next page, select the “Select driver names from a list” option
9. Now, to load all the drivers, click “Next“.
Wait for Windows to load all the drivers.
You can view several drivers from Microsoft and some from third-party vendors.
10. Check all the third-party drivers one by one through the list.
11. Finally, tap “Finish” to start the driver verifier.
Now, your computer will restart and start to scan all the third-party drivers for corruption.
This process may take a while as all the tests run on the driver. Once the computer identifies the faulty driver.
Fix 3 – Disable/Uninstall the Antivirus
The antivirus on your system may also cause this problem. Third-party antivirus can create this problem. So, you should just disable or uninstall it from your computer.
1. You can open the Programs & Features page very easily.
2. Just, press the Win key+R keys together. Then, write this there and hit Enter.
3. Here, look for the third-party antivirus you are using currently.
4. Right-click that and tap “Uninstall” to uninstall the antivirus from your computer.
Just follow the on-screen steps to completely uninstall the antivirus software from your computer.
Fix 4 – Use DDU to clean the GPU driver
You can use the Display Driver Uninstaller to clean the existing installation of GPU files and components and install the latest build of the driver.
Step 1 – Download and EXTRACT DDU
Just download and extract the DDU zip file.
1. Download the Display Driver Uninstaller.
2. Then, visit the location of the DDU file.
3. Just, extract the “DDU v220.127.116.11” file somewhere on your system that you can access later.
4. You can set the extraction path manually.
5. Then, tap “Extract“.
Now, you can download the graphics card driver from the manufacturer’s website easily. We have shown the steps of how to download the driver for the NVIDIA card.
1. At first, you need to open up the NVIDIA Driver downloads website.
2. Then, input various information on the graphics card driver specifications (like the Product Download Type, Language, etc.) in the box.
3. Once you are done, tap “Search” for the graphics card.
4. Coming to the next page, you can view the latest driver.
5. Then, “Download” sign to download the latest graphics driver.
Step 2 – Boot into Safe Mode and use DDU
You can’t use Display Driver Uninstaller in normal mode. So, you have to boot the system into Safe and Mode and clean the graphics driver installation.
1. You can open the Settings page using the Windows key+I keys together.
2. Tap on “System” settings to access it.
3. Then, tap the “Recovery” option to explore it.
4. Later, tap “Restart now” in the Advanced startup section to restart the system.
Wait until Windows boots into Recovery Mode.
5. When you land on the first page of the Recovery screen, tap
6. Now, click “Advanced options” to go forward.
7. You can find various options here.
8. But, you have to click the “Startup Settings” one.
9. Now, tap “Restart” to restart the system.
Wait until your system restarts.
10. Here, you can see the available list of options for Startup settings.
11. Then, just press the F4 from your keyboard.
This will open the computer in Safe Mode.
Wait patiently till Windows boots up in Safe Mode. How can differ it from normal mode? In Safe Mode, personalization is blocked and so, the Desktop appears black.
Step 3 – USE DDU
You can use the Display Driver Uninstaller now to clean the NVIDIA driver installation and restart the system.
1. Open File Explorer and visit the location of DDU files.
2. Open the DDU folder.
3. Then, double-tap the “Display Driver Uninstaller” to access it.
4. When the DDU page opens up, set the ‘Select device type’ to “GPU“. Set the next option to “NVIDIA“.
5. Later, to clean GPU files and restart, tap “Clean and Restart“.
After the system restarts, you can use the downloaded installer to install the latest graphics driver.
Fix 5 – Run an SFC, DISM check
Run the SFC and DISM scan check on your computer to fix the problem.
1. Search “cmd” in the search box.
2. Then, right-click on the “Command Prompt” and tap on “Run as administrator” to open the CMD terminal as an administrator.
3. Now, paste this DISM-scanning command into the terminal and hit Enter.
DISM.exe /Online /Cleanup-image /Restorehealth
Windows will run a DISM check.
4. Wait till the DISM scanning operation completes, write this SFC scan code, and hit Enter to run an SFC scan.
Close the terminal page after running the System File Checking scan tool.
Restart your computer. you won’t see the WiFiCx.sys BSOD again.
Additional Note –
According to some users, the Vanguard Anti Cheat (that is used by Valorant or other Riot Games) is the main culprit. You can directly uninstall the Vanguard anti-cheat.
This should help you resolve the problem.
Sambit is a Mechanical Engineer By qualification who loves to write about Windows 10 and solutions to weirdest possible problems.