: Some antivirus or firewall software (like Sophos) is known to block the WinDivert driver. Temporarily disabling these may allow the driver to load. Test-Signing Mode
If you are launching the program via a .bat (batch) script, you must right-click the batch file itself and choose . Step 5: Fix System File Corruption
A previous instance of the WinDivert driver is still running or hung in the background, preventing a new version from installing.
Make sure you are always right-clicking your application and choosing "Run as Administrator." WinDivert requires high-level permissions to interact with your network stack. : Some antivirus or firewall software (like Sophos)
Avoid forcefully closing command prompts running network tools. Use Ctrl + C to stop them properly so they can uninstall the driver automatically.
The message "windivert driver cannot be installed you must restart your computer" typically appears when using WinDivert (a packet capture/diversion library for Windows). It means the WinDivert kernel driver failed to load or install, often due to:
Maya sighs. She tries running the installer as Administrator. Same error. She disables antivirus. Same error. She checks Device Manager—no yellow flags. She even manually tries to register the driver with sc start WinDivert . Nothing works. Step 5: Fix System File Corruption A previous
: If you see "Error 577," Windows is rejecting the driver's signature. Updating Windows often resolves this by refreshing root certificates.
When a program tells you to restart but restarting doesn't work, it means Windows has cached a broken service state. You can manually delete this service using the Command Prompt.
Alternatively, you can use the bcdedit command in Windows to temporarily disable driver signature enforcement for a single boot: Use Ctrl + C to stop them properly
Antivirus or security software might be interfering with the installation.
Press Win + R , type regedit , and navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDivert the WinDivert folder and select Delete . Restart your PC. Common Causes for Failed Installation WinDivert – Real-Time Network Traffic Control on Windows
This forces a clean driver reload and often resolves the error after a single cycle.
: Using a 32-bit driver on a 64-bit system (or vice versa) frequently triggers installation failures.
Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDivert Right-click and the WinDivert folder. 3. Disable Core Isolation