How to reset your BIOS/CMOS - CyberPowerPC UK

Reset Your CMOS by Reseating the CMOS Battery

To reset your CMOS please remove the CMOS battery. This battery allows the volatile CMOS memory to stay powered even when the computer is disconnected from an outlet. By removing and replacing the battery, you’ll erase the CMOS, forcing a reset.

1. Turn off your computer.

2. Disconnect your computer from the wall outlet.

3. Press the power button multiple times to clear any capacitors.

4. Find the CMOS battery on your motherboard. This is most commonly a CR2032 battery, a coin-sized battery as shown below. You’ll find it near the PCI Express slots on most motherboards. You can consult your motherboard’s manual for its exact location if you are having difficulty.

5. Gently remove the CMOS battery. If it is secured by a metal clip, slide the battery out from under the clip. Take care not to bend the clip.

6. Wait a few minutes, then re-place the CMOS battery back into the motherboard.

7. Plug the power cable back into the wall outlet and power on your computer.

Example of two most common batteries onboard:

If your motherboard looks like the above image, then ​remove the white plug on the motherboard.