The BIOS is stored on a chip on the computer's motherboard.
A personal computer's BIOS is a computer program stored on a chip on the motherboard. The BIOS serves as an interface between the computer and its peripheral devices. When the computer is turned on or rebooted, the BIOS tests the computer, memory and peripheral hardware--and then starts an operating system or multiple OS boot manager. (See Reference 1.) The procedure for updating the BIOS varies with computer model and manufacturer.
Instructions
1. Identify your computer's manufacturer and model.
2. Visit the computer manufacturer's website. BIOS updates, sometimes called firmware updates, are usually found in the Support section of the website. If your computer's manufacturer is no longer in business or no longer supports your model, there are third-party websites that may have an upgrade. (See Reference 2, How Do I Determine Who to Contact About an Upgrade?)
3. Download the correct BIOS update for your computer model. Only select a BIOS version that is explicitly designed for your computer--installing the wrong BIOS version will likely leave your computer unable to boot.
4. Install the BIOS update--this is sometimes called flashing the BIOS. Do not interrupt the process once it has started--an incomplete flashing may leave your computer unable to boot.
5. Reboot your computer.
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