Windows & BSOD · critical

How to fix0x00000139

KERNEL_SECURITY_CHECK_FAILURE

What this error means

KERNEL_SECURITY_CHECK_FAILURE (0x00000139) is a critical-severity fault affecting the Windows operating system. The kernel detected corruption of security-critical data structures. Another common trigger is driver conflict (typically anticheat or antivirus). Work through the steps below in order.

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 3 complete
01Enable memory integrity protection in Windows Security

Enable memory integrity protection in Windows Security.

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

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02Uninstall foreign antivirus

Uninstall foreign antivirus.

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

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03Repair corrupted files with DISM and SFC

Repair corrupted files with DISM and SFC.

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

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Possible causes

  • Driver conflict (typically anticheat or antivirus)
  • Kernel stack overflow
  • Corruption of system files