KERNEL_SECURITY_CHECK_FAILURE (0x00000139) anti-cheat or memory crash
Windows kernel integrity check failed, typically caused by kernel-level anti-cheat drivers (Vanguard, BattlEye, EAC) or faulty .
Internal desktop parts run on harmless 12V DC voltage and cannot shock you. Simply unplug the wall power cable first, then touch the unpainted metal case frame to ground static electricity.
Common Symptoms & Tells
- Stop code KERNEL_SECURITY_CHECK_FAILURE
- Crashes while playing Valorant, Rainbow Six Siege, or Easy Anti-Cheat games
- Crash dump references vgk.sys, bedaisy.sys, or easyanticheat.sys
Interactive Fix Checklist
0 of 3 steps completedReinstall clean Anti-Cheat service
Uninstall the offending anti-cheat (e.g. Riot Vanguard) from Windows Apps & Features. Delete its leftover program directory in 'C:\Program Files\Riot Vanguard'. Reboot PC, then launch game client to reinstall fresh service.
Test memory integrity with Windows Memory Diagnostic
Press Win+R, type 'mdsched.exe' and choose 'Restart now and check for problems'. If memory errors are reported, run MemTest86 on a bootable USB to pinpoint failing modules.
Run DISM and SFC scans to verify kernel integrity
Open Terminal as Administrator. Run 'DISM.exe /Online /Cleanup-image /Restorehealth' followed by 'sfc /scannow' to repair damaged system DLL files.
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