Processor · critical

How to fixWHEA_BOOT_LOOP

WHEA Uncorrectable Error Loop on Boot

What this error means

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.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 4 complete
01Disable CPU C-States in BIOS

Disable CPU C-States in BIOS.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Flash the latest BIOS firmware

Flash the latest BIOS firmware.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Increase Vcore voltage offset slightly

Increase Vcore voltage offset slightly.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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04Disable Intel SpeedShift / AMD Cool'n'Quiet

Disable Intel SpeedShift / AMD Cool'n'Quiet.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Faulty CPU core
  • Incompatible BIOS version
  • Degraded VRM power delivery
  • Unstable CPU core voltage offset