To fix the system_thread_exception_not_handled_m error, follow these steps: 1. Boot your Windows PC into Safe Mode. 2. Update or roll back drivers. 3. Rename the faulty driver. 4. Use the DISM and SFC command combination. 5. Restore your PC to a previous version. By following these steps, you can troubleshoot and resolve the system_thread_exception_not_handled_m error on your Windows 10/11 PC.