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

Work through these checks

0 of 4 complete
01MemTest86 overnight

MemTest86 overnight.

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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02Reset BIOS to default

Reset BIOS to default.

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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03Update the drivers

Update the drivers.

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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04Check the cooling

Check the cooling.

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 RAM
  • Overclocking
  • Defective driver
  • High CPU temperature

Useful Windows tools

These commands open Windows tools. Review any action inside the tool before applying changes.

mdsched.exe