Processor · critical

How to fixThermal Shutdown

PC shuts off without warning at load

What this error means

PC shuts off without warning at load ranks as a critical-severity processor (CPU) issue in our database. The system firmware or motherboard sensors detected temperatures exceeding critical safe operating limits (usually Tj Max of 95°C to 105°C), triggering an immediate emergency power cut to prevent permanent silicon damage. The usual suspects are dried-out or incorrectly applied thermal paste, failing or disconnected CPU cooler fan or pump and dust accumulation clogging the heatsink fins. 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 3 complete
01Clean dust from heatsinks, fans, and vents

Clean dust from heatsinks, fans, and vents.

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

I need help
02Reapply high-quality thermal paste and remount cooler

Reapply high-quality thermal paste and remount cooler.

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

I need help
03Ensure cooler fan or liquid cooling pump is running

Ensure cooler fan or liquid cooling pump is running.

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

I need help

Possible causes

  • Dried-out or incorrectly applied thermal paste
  • Failing or disconnected CPU cooler fan or pump
  • Dust accumulation clogging the heatsink fins