SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

What is SYSTEM-THREAD-EXCEPTION?

SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (SYSTEM-THREAD-EXCEPTION) is a critical-severity fault affecting the system driver. A system thread threw an unhandled exception, most commonly a bad driver (.sys) file. Work through the steps below in order.

Common Causes

• Bad .sys driver file
• Corrupt driver installation
• Incompatible driver version

Step-by-Step Fix Guide

• 1
  Boot into Safe Mode

  We'd suggest Boot into Safe Mode first — it's the fix most often responsible for solving SYSTEM-THREAD-EXCEPTION outright.

• 2
  Identify the faulty .sys from the stop code

  If the fault persists, continue with the next steps, which account for less common drivers instability causes.

• 3
  Uninstall or update the

  For lingering SYSTEM-THREAD-EXCEPTION cases, "Uninstall or update the" is worth running through.

• 4
  driver Run SFC

  If earlier steps didn't help, "driver Run SFC" directly addresses bad .sys driver file.

Commands & Diagnostics

Frequently Asked Questions