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. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 4 complete
01Run System File Checker (SFC) and DISM
  1. Run System File Checker (SFC) and DISM
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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02Check memory using Windows Memory Diagnostic or MemTest86
  1. Check memory using Windows Memory Diagnostic or MemTest86
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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03Update or rollback recently installed device drivers
  1. Update or rollback recently installed device drivers
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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04Disable overclocking in BIOS/UEFI
  1. Disable overclocking in BIOS/UEFI
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

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 changes before applying them.

mdsched.exe