Processor · critical

How to fixMACHINE_CHECK_EXCEPTION

MCE - Machine Check Exception

What this error means

MCE - Machine Check Exception (MACHINE_CHECK_EXCEPTION) is a critical-severity fault affecting the processor (CPU). The CPU has detected a fatal hardware error. It could be a faulty processor or motherboard. It's most often caused by defective CPU, unstable power supply and l3 cache failure. See the troubleshooting steps below for the fix.

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Check CPU power
  1. Check CPU power
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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02Test with default BIOS
  1. Test with default BIOS
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Contact service
  1. Contact service
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • Defective CPU
  • Unstable power supply
  • L3 cache failure