Windows errors

Blue screen: WHEA_UNCORRECTABLE_ERROR stop code

This blue screen is triggered directly by the computer's hardware reporting an error it couldn't correct on its own, most often related to the CPU, RAM, or motherboard rather than a software issue.

Difficulty
Advanced
Time
1–3 hours
DIY cost
$0
Pro cost
$120–$280

Symptoms

  • Blue screen specifically names WHEA_UNCORRECTABLE_ERROR
  • Can happen randomly or under heavy load like gaming or video editing
  • Often more frequent when the PC is overclocked
  • PC restarts after the crash

Likely causes

  • CommonCPU or RAM instability from overclockingPushing hardware beyond its stable limits is a very frequent cause of this specific hardware-reported error.
  • CommonOverheating CPUThermal issues can cause the processor to report uncorrectable errors under load.
  • PossibleFaulty RAMMemory errors can be reported this way rather than through the more software-oriented memory stop codes.
  • PossibleFailing power delivery to the CPU (motherboard VRM or power supply)Insufficient or unstable power under load can trigger CPU-reported errors.
  • Less commonAging or failing CPUIn older systems, this can indicate the processor itself is starting to degrade.

What to do

  1. If you've overclocked the CPU, RAM, or GPU using any software or BIOS settings, revert everything to default/stock values as the first step.
  2. Check CPU temperatures under load using a monitoring tool; if they're running high, check that the CPU cooler is properly seated and not clogged with dust.
  3. Run Windows Memory Diagnostic to test RAM for errors, letting it complete a full pass.
  4. Update your motherboard's BIOS/UEFI firmware from the manufacturer's site, since CPU microcode updates that improve stability are often included.
  5. If the PC is under warranty or newer, check the manufacturer's site for known issues with this stop code on your specific CPU model.
  6. Test with one RAM stick at a time if a memory test doesn't clearly find an error but you still suspect memory.
  7. If crashes continue with stock settings, normal temperatures, and passing memory tests, the CPU or motherboard's power delivery may be failing and needs professional testing.

Tools and parts

  • Temperature monitoring software

When to call a pro

If reverting overclocks and checking temperatures and RAM don't resolve WHEA errors, a technician can run targeted CPU and motherboard diagnostics, since this error often points to hardware.

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.