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. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Check CPU power

Check CPU power.

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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02Test with default BIOS

Test with default 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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03Contact service

Contact service.

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

  • Defective CPU
  • Unstable power supply
  • L3 cache failure