Windows errors

Blue screen: KERNEL_SECURITY_CHECK_FAILURE stop code

This blue screen means Windows detected that a core piece of its internal data had been altered or corrupted in a way that violates its integrity checks, often linked to drivers, corrupted system files, or occasionally malware.

Difficulty
Intermediate
Time
1–2 hours
DIY cost
$0
Pro cost
$80–$150

Symptoms

  • Blue screen specifically names KERNEL_SECURITY_CHECK_FAILURE
  • May happen after installing new software, a driver, or hardware
  • Can also occur seemingly at random
  • PC restarts after the crash

Likely causes

  • CommonOutdated or corrupted driverThis is one of the more frequent stop codes tied directly to problematic drivers.
  • CommonCorrupted system filesDamage to core Windows components can trigger this integrity check failure.
  • PossibleFaulty RAMMemory errors can corrupt data in a way that triggers this security check.
  • PossibleIncompatible overclocking or performance softwareAggressive hardware tweaking tools can destabilize the system enough to trigger this.
  • Less commonMalware tampering with system filesLess common, but some malicious software can trigger this specific integrity failure.

What to do

  1. Note whether the crashes started right after installing a specific driver, software, or hardware, and uninstall or roll that back first if so.
  2. Run 'sfc /scannow' and then 'DISM /Online /Cleanup-Image /RestoreHealth' in an administrator Command Prompt to check for and repair corrupted files.
  3. Update all drivers, particularly graphics, chipset, storage, and network, directly from the manufacturer's websites.
  4. If you use any overclocking or performance-tuning software (for CPU, GPU, or RAM), revert all settings to default/stock and see if crashes stop.
  5. Run Windows Memory Diagnostic to rule out faulty RAM as a contributing cause.
  6. Run a full antivirus/anti-malware scan to rule out tampering as a cause.
  7. If crashes continue after driver updates and file repairs, try a clean boot to identify a conflicting background program or service.

Tools and parts

  • None beyond what's built into Windows

When to call a pro

If the crash persists after driver updates, file repair, and reverting any overclocking, a technician can analyze the crash dump to pinpoint the exact cause.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.