Restart Your Computer Top Best — Windivert Driver Cannot Be Installed You Must

If the error persists, check these system-level security features:

: Open a Command Prompt as Administrator and run these commands to clear out the old driver service: sc stop WinDivert sc delete WinDivert

WinDivert uses a test-signed certificate. On 64-bit Windows with Secure Boot enabled, driver signature enforcement may block unsigned or self-signed kernel drivers, causing the installation to fail.