Windows & BSOD · critical

How to fixKERNEL_SECURITY_CHECK_FAILURE

KERNEL_SECURITY_CHECK_FAILURE (0x00000139)

What this error means

This critical-severity issue affects the Windows operating system. The KERNEL_SECURITY_CHECK_FAILURE bug check has a value of 0x00000139. This BSOD indicates that the kernel has detected corruption of a critical data structure. This is usually caused by memory corruption, driver issues, or hardware failure. Common triggers are corrupted system drivers and corrupted Windows system files. Use the steps below to track down and fix the cause.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 4 complete
01Run System File Checker (SFC) and DISM

Run System File Checker (SFC) and DISM.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help
02Check memory using Windows Memory Diagnostic or MemTest86

Check memory using Windows Memory Diagnostic or MemTest86.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help
03Update or rollback recently installed device drivers

Update or rollback recently installed device drivers.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help
04Disable overclocking in BIOS/UEFI

Disable overclocking in BIOS/UEFI.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help

Possible causes

  • Corrupted system drivers
  • Defective RAM memory modules
  • Corrupted Windows system files
  • Incompatible third-party security software

Useful Windows tools

These commands open Windows tools. Review any action inside the tool before applying changes.

mdsched.exe