Windivert Driver Cannot Be Installed You Must Restart Your Computer Top -

This is a very common and frustrating error, typically associated with software that needs to intercept or modify network traffic (such as VPNs, ad blockers like AdGuard, or firewall applications like SimpleWall).

• Restart your computer.
• As it boots, press the key to enter the UEFI settings (varies by system, often F2, F12, or Del).
• Navigate to the "Advanced" or similar tab.
• Look for "Secure Boot" and disable it.
• Save changes and exit.

WinDivert (Windows Packet Divert) operates at the kernel level. When an application closes improperly, it may leave the driver registered in the Windows Service Control Manager. Windows prevents a "new" installation of the driver to avoid a system crash (BSOD), leading to the infinite restart prompt. This is a very common and frustrating error,

Cleanup procedure:

1. Open Command Prompt as Administrator.
2. Stop any WinDivert service:

   net stop WinDivert
   sc delete WinDivert
   

3. Remove the driver file:

   del C:\Windows\System32\drivers\WinDivert64.sys
   del C:\Windows\SysWOW64\WinDivert.dll   (if exists)
   

4. Open Device Manager → View → Show hidden devices → Network adapters. Uninstall any grayed-out "WinDivert" adapter.
5. Delete the WinDivert registry keys (backup first):