System BIOS stands for basic input/output system. Without BIOS, a computer would be useless. The BIOS is needed for everything, and the BIOS can and should be upgraded with newer firmware from time to time. In some cases, you might want to rollback the upgrade you put into your BIOS, especially if you experience problems. Rolling back the BIOS upgrade is simple and should only take from five to ten minutes.
Instructions
1. Unplug the power cable from your computer.
2. Remove any screws necessary in order to open your computer's case. Consult your user's manual if you're uncertain about remove the side. Some cases use levers to hold the side on.
3. Open the case on your computer to reveal the motherboard.
4. Search for a small battery that looks exactly like a watch battery. It is small and circular. Your user manual may also indicate where the CMOS battery is located. Many times the motherboard itself labels each component. Remove it.
5. Wait approximately one minute. Insert the battery back into its slot.
6. Put the case back on your computer and screw your screws back into the side.
7. Plug your power cable back in and turn on your computer. Your BIOS should be rolled back to the default setting.
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