1. Reboot your computer. Try this simple step first, as sometimes a simple restart can resolve this system error.
2. Reboot your computer again if the above step doesn't solve the problem. Press and hold the 'F8' key during startup.

3. Select the 'Last Known Good Configuration' using your arrow keys and press 'Enter.' Reboot your computer. You should no longer see the 'C00002a Fatal System Error' message.