What is WHEA-UNCORRECTABLE-ERROR?
WHEA_UNCORRECTABLE_ERROR is a critical-severity processor (CPU) problem. Critical CPU or chipset hardware error (BSOD 0x124). Caused by voltage instability, overheating or overclocking. This can also stem from defective RAM. Follow the steps below to fix it.
Common Causes
- CPU overheating
- Unstable Vcore voltage
- Overclocking beyond limits
- Defective RAM
Step-by-Step Fix Guide
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1
Reset BIOS to default
Begin with Reset BIOS to default; it's the step that resolves WHEA_UNCORRECTABLE_ERROR for the largest share of reported cases.
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2
Check temperatures in HWMonitor
If it comes back, the next steps in the sequence are there specifically for atypical cpu instability cases.
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3
Run MemTest86
"Run MemTest86" covers a less common but documented cause of WHEA-UNCORRECTABLE-ERROR.
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4
Update the BIOS
Still seeing WHEA-UNCORRECTABLE-ERROR after that? "Update the BIOS" is the next thing to check.
Commands & Diagnostics
chkdsk /f /r
sfc /scannow
Frequently Asked Questions
CPU overheating accounts for the majority of WHEA-UNCORRECTABLE-ERROR reports; unstable Vcore voltage, overclocking beyond limits and defective RAM come up less often but are documented.
Try "Reset BIOS to default" first — it resolves most WHEA-UNCORRECTABLE-ERROR cases on its own. Only work through the rest of the guide above if it comes back.
Treat WHEA-UNCORRECTABLE-ERROR as urgent — it's flagged critical severity, meaning repeated occurrences risk data loss or hardware damage.
You shouldn't need to. Work through the guide above first — a reinstall is only worth considering if none of those steps help.
Not necessarily. WHEA-UNCORRECTABLE-ERROR can be triggered by software and driver issues, overclocking instability, or BIOS misconfigurations — not just hardware failure. Run through the diagnostic steps above before concluding the processor itself is defective.
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