What is WHEA-BOOT-LOOP?
WHEA_BOOT_LOOP shows up as a critical-severity processor (CPU) fault. A critical CPU power delivery or microcode stability failure that prevents the operating system from completing its boot sequence, triggering a repetitive Blue Screen (BSOD) before reaching the desktop. The usual suspects are faulty CPU core, incompatible BIOS version and unstable CPU core voltage offset. The steps below are ordered to resolve this efficiently.
Common Causes
- Faulty CPU core
- Incompatible BIOS version
- Degraded VRM power delivery
- Unstable CPU core voltage offset
Step-by-Step Fix Guide
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1
Disable CPU C-States in BIOS
Disabling C-States prevents the CPU from dropping into low-voltage sleep modes, stabilizing voltage fluctuations during boot.
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2
Flash the latest BIOS firmware
Updating the BIOS provides the latest manufacturer microcode updates for CPU stability.
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3
Increase Vcore voltage offset slightly
If earlier steps didn't help, "Increase Vcore voltage offset slightly" directly addresses unstable CPU core voltage offset.
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4
Disable Intel SpeedShift / AMD Cool'n'Quiet
Try "Disable Intel SpeedShift / AMD Cool'n'Quiet" next if the issue persists — it addresses a secondary cause.
Commands & Diagnostics
No specific commands required for this error. Follow the step-by-step guide above.
Frequently Asked Questions
In most cases, faulty CPU core is behind WHEA-BOOT-LOOP. Incompatible BIOS version, degraded VRM power delivery and unstable CPU core voltage offset can trigger it too.
The fastest fix is "Disable CPU C-States in BIOS". Only move on to the later steps if WHEA-BOOT-LOOP keeps coming back.
WHEA-BOOT-LOOP is rated critical severity in our database. It's worth acting on quickly rather than letting it recur.
Usually. WHEA-BOOT-LOOP is fixable with the steps above; a full Windows reinstall is rarely necessary unless everything else has failed.
Not necessarily. WHEA-BOOT-LOOP 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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