A small battery on the motherboard stores custom BIOS settings
The BIOS is the setup program for personal computers. It is responsible for testing the computer's main components, allowing the operating system to recognize the components that are part of the computer's motherboard, booting your computer's operating system, and provides access to components such as the keyboard individual of the operating system. Accessing the BIOS menu is simple, but the process will vary depending on the type of computer you have.
Instructions
1. Turn your computer on as you normally would.
2. Press a particular key (See "Resources" section below) while your computer is starting up to bring the BIOS menu.
3. Enter your username and password when prompted. If you never set a password, but are still prompted, consult your product's documentation. If you don't find a default username and password, you will need to reset the BIOS.
Resetting the BIOS
4. Shut down your computer.
5. Open your computer's case so that you can access the motherboard. Some cases can be unscrewed by hand, but others require a screwdriver.
6. Look for a battery that is located on the motherboard. It will look like a small watch battery; this is the CMOS battery, which stores custom settings for the BIOS.
7. Remove the battery if it is able to removed. If it is soldered to the motherboard, there should be a jumper near the battery that will reset the BIOS. If it is not labeled as the CMOS battery jumper, consult your motherboard's documentation to locate the right jumper. Wait several seconds and replace the battery, or restore the jumper. Now you will be able to access the BIOS menu without a password.
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