How to Fix STOP CODE 0x000000C9

1. **Restart Your Computer**: Begin by rebooting your system to see if the error resolves itself. This can often clear temporary issues. 2. **Remove Any Recent Hardware Changes**: If you recently added new hardware, remove it to determine if it's causing the error. 3. **Update Drivers**: - Open Device Manager by right-clicking the Start button and selecting Device Manager. - Expand the categories, right-click on any devices with a yellow exclamation mark, and choose “Update driver.” 4. **Run Windows Update**: - Press `Windows + I` to open Settings. - Click "Update & Security," and then "Windows Update." - Check for updates and install any pending updates. 5. **Check for Corrupted System Files**: - Open Command Prompt as an administrator. - Type `sfc /scannow` and hit Enter. This will scan and repair corrupted system files. 6. **Run Hardware Diagnostics**: Many manufacturers provide built-in diagnostic tools. Access these tools during startup to check for hardware faults. 7. **Check for Overheating**: Ensure your system is not overheating. Clean your CPU and GPU fans, and ensure proper airflow in your case. 8. **Reset Windows**: If the issue persists, consider resetting Windows. Go to Settings > Update & Security > Recovery, and choose "Reset this PC." 9. **Seek Professional Help**: If you are unable to resolve the error through the steps above, it may be best to consult a professional technician.