vgk.sys Blue Screen on Windows 11

vgk.sys is part of Riot Vanguard, the anti-cheat system for Valorant. If it causes blue screen crashes, run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth in an administrator Command Prompt.

Disable or uninstall any other antivirus or anti-cheat programs that might conflict with Vanguard. Update or roll back your graphics and network drivers. Do a clean boot to check for software conflicts.
Make sure the Vanguard service is running and update your BIOS if needed. Finally, uninstall Vanguard and Valorant completely, restart your PC, and reinstall them.

If the crashes began after a driver update, roll back to the previous version. If your drivers are old, update them from the manufacturer’s site. Usually, updating first is a good idea. Let me know if you need help.