KERNEL_SECURITY_CHECK_FAILURE Error: Causes, Diagnosis, and Step-by-Step Fix

Quick Answer

KERNEL_SECURITY_CHECK_FAILURE is a Windows Blue Screen of Death (BSOD) error caused by corrupted memory, incompatible drivers, or damaged system files. It is fixable in most cases without reinstalling Windows, provided you follow a structured diagnosis process.

What Causes KERNEL_SECURITY_CHECK_FAILURE

This stop code appears when Windows detects that a kernel-level data structure has been violated or that memory integrity has been compromised. Common triggers include:

• Faulty or mismatched RAM sticks
• Recently updated or incompatible device drivers (most often GPU, network, or storage drivers)
• Malware that injects into kernel space
• SSD or HDD with bad sectors causing file system corruption
• Overclocking instability, including RAM running at XMP speeds that exceed what the IMC supports
• A Windows update that introduced an incompatible kernel patch

Step-by-Step Diagnosis and Fix

Step 1 - Note the stop code detail. When the BSOD appears, Windows displays a secondary parameter below the main error. Photograph or note the hexadecimal value. This narrows down whether the issue is driver-related (0x00000190) or memory-related (0x00000139).

Step 2 - Boot into Safe Mode. Restart and press F8 or hold Shift while clicking Restart, then choose Safe Mode with Networking. If the BSOD does not occur in Safe Mode, a driver or startup program is the cause, not hardware.

Step 3 - Run Windows Memory Diagnostic. Press Win + R, type mdsched.exe, and restart. The tool will check your RAM for errors. If errors are found, test each stick individually by removing all but one.

Step 4 - Roll back or update drivers. Open Device Manager, right-click the GPU or network adapter, and choose Properties > Driver > Roll Back Driver if a recent update preceded the BSOD. Alternatively, download the latest driver directly from the manufacturer's site and perform a clean install.

Step 5 - Run SFC and DISM. Open Command Prompt as administrator and run:

• sfc /scannow
• DISM /Online /Cleanup-Image /RestoreHealth

These commands repair corrupted Windows system files that can trigger kernel errors.

Step 6 - Check for disk errors. Run chkdsk C: /f /r in an elevated Command Prompt and restart. This scans for and repairs bad sectors that may corrupt system files.

Step 7 - Check overclock stability. If your RAM is running at XMP, reset BIOS to default speeds temporarily to rule out memory controller instability.

Frequently Asked Questions

Does KERNEL_SECURITY_CHECK_FAILURE mean my PC is infected?

Not necessarily. Malware is one possible cause, but driver issues and faulty RAM are far more common. Run a full system scan with Windows Defender, but also follow the hardware diagnostics above.

Can I fix this error without losing my data?

In most cases, yes. SFC, DISM, and driver rollbacks do not delete personal files. Only a Windows reinstall would risk data loss, and that is typically a last resort.

My PC BSODs during loadshedding recovery. Is that related?

Possibly. Sudden power restoration can cause incomplete writes to the SSD, corrupting system files. A UPS prevents this by providing clean power transitions, and running chkdsk after a power-cut BSOD is always advisable.