The error message "WinDivert driver cannot be installed, you must restart your computer" often appears when users try to run network tools like GoodbyeDPI, ReQrypt, or custom VPN software. This usually happens because an older version of the driver is stuck in memory, or Windows is blocking the new installation due to security settings like Memory Integrity. Why the Error Persists After Restarting A standard reboot doesn't always clear the issue if:
Right-click the application shortcut causing the error and select Run as administrator Stack Overflow 3. Clear the Existing WinDivert Service The error message "WinDivert driver cannot be installed,
The “WinDivert driver cannot be installed” error is annoying, but it’s Windows trying to protect you from unsigned or stale drivers. In 90% of cases, disabling Fast Startup + removing old driver remnants solves it instantly. Close VPNs, packet-capture, firewall, or sandbox tools that