If your PC is stuck in a boot loop, you cannot apply fixes from the regular desktop. You must boot into Safe Mode, which launches Windows with only the bare minimum drivers. Turn off your computer completely.
The primary culprit is almost always a . Drivers act as translators between your hardware and the operating system; when this translation breaks, a system thread can crash.
Save and exit to see if the system stabilizes under stock speeds. Summary Troubleshooting Checklist Action Item Target Issue Note the file name on the BSOD screen Pinpoints the exact faulty hardware driver 2 Interrupt boot 3 times to enter Safe Mode Bypasses driver loops to give you system access 3 Wipe graphics drivers using DDU utility Resolves nvlddmkm.sys or amdkmdag.sys crashes 4 Install latest motherboard BIOS update Fixes core system compatibility with new hardware 5 Run Windows Memory Diagnostic tool Identifies physical faults in new RAM modules
Force shutdown your PC by holding the power button for 10 seconds while it's booting. system thread exception not handled new
If the BSOD happens , disable Fast Startup in Power Options → Choose what power buttons do → uncheck “Turn on fast startup (recommended).” This resolves many thread exception BSODs caused by incomplete driver resumption.
To fix the "System Thread Exception Not Handled" error, try the following solutions:
: Go to Settings > Windows Update > Check for updates and install all critical and optional updates. If your PC is stuck in a boot
Rename the offending driver file (replace filename.sys with the actual name shown on your BSOD screen, such as atikmdag.sys ): ren filename.sys filename.old Use code with caution.
Download the latest official driver from the manufacturer's site (Nvidia, AMD, or Intel).
Restore system
Download a free third-party utility called .
The "System Thread Exception Not Handled" error is one of the most frustrating Blue Screen of Death (BSOD) crashes in Windows 10 and 11. It frequently occurs right after a Windows update, a new hardware installation, or a driver modification. Because the error forces your computer to restart immediately, it can disrupt your work and lead to data loss.