This is how u clear the CMOS on your mobo, the manual way.
You may clear the CMOS values by removing the battery:
1. Turn off your computer and unplug the power cord.
2. Gently remove the battery from the battery holder and wait for one
minute. (Or use a metal object like a screwdriver to touch the positive
and negative terminals of the battery holder, making them short for 5
3. Replace the battery.
4. Plug in the power cord and restart your computer.