If you've locked yourself out of your Compaq Presario by an unknown CMOS password, you can reset the password -- along with all other CMOS settings -- by removing the computer's backup battery for ...

PCs have a battery on the motherboard that provides the Complementary Metal-Oxide Semiconductor with a minimal amount of power, even when unplugged. This CMOS battery lets the system clock keep ...

Download and launch BIOS update from the motherboard manufacturer's website. Another is by reinitializing the BIOS. Certain motherboards allow you to reset the BIOS settings directly with a switch. If ...

Once you are sure that the positive pole of the battery is visible, gently remove the battery, taking care not to touch any other part of the motherboard. Go to your local tech parts retailer, and buy ...