To clear the CMOS on your Intel NUC, follow these steps:
1. Power off the NUC and unplug it from the power source.
2. Locate the CMOS jumper on the motherboard.
3. Use a small tool to move the jumper from pins 1-2 to pins 2-3.
4. Wait for a few seconds, then move the jumper back to its original position (pins 1-2).
5. Plug the NUC back in and power it on. Your CMOS will now be cleared.