system_thread_exception_not_handled
Moderate
Microsoft · Windows
A system thread generated an exception that the error handler did not catch — typically caused by a driver that crashed during a routine operation
Quick Answer
Error code SYSTEM_THREAD_EXCEPTION_NOT_HANDLED on your Microsoft Windows means: A system thread generated an exception that the error handler did not catch — typically caused by a driver that crashed during a routine operation. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Read the BSOD screen carefully — it will often show the failing driver file name (e.g., nvlddmkm.sys for NVIDIA, atikmdag.sys for AMD)
2
Boot into Safe Mode (Shift+Restart > Troubleshoot > Startup Settings > F4)
3
In Safe Mode, open Device Manager, find the device associated with the failing driver, right-click and select 'Roll back driver' or 'Uninstall device'
4
Download the latest driver for that device directly from the hardware manufacturer's website
5
If the failing driver is nvlddmkm.sys or atikmdag.sys (GPU drivers), use DDU in Safe Mode for a complete driver removal, then install fresh drivers
6
Run: sfc /scannow from an elevated Command Prompt to check for corrupted system files
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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