Windows & BSOD · critical

How to fixUNEXPECTED_KERNEL_MODE_TRAP

Unexpected kernel trap

What this error means

UNEXPECTED_KERNEL_MODE_TRAP shows up as a critical-severity Windows operating system fault. The CPU generated an interrupt that the kernel could not catch. Typically HW error or damaged driver. Common triggers are defective RAM, overclocking and high CPU temperature. Follow the steps below to fix it.

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 4 complete
01MemTest86 overnight
  1. MemTest86 overnight
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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02Reset BIOS to default
  1. Reset BIOS to default
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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03Update the drivers
  1. Update the drivers
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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04Check the cooling
  1. Check the cooling
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 RAM
  • Overclocking
  • Defective driver
  • High CPU temperature

Useful Windows tools

These commands open Windows tools. Review changes before applying them.

mdsched.exe