Unlike your operating system (which is stored on your hard drive), your computer’s BIOS is stored on a chip on your motherboard.
Manufacturers often release updates to their computers’ BIOSes.
If you built your computer then you know the brand of the motherboard that you purchased and you will also likely know the model number. If you purchased your computer prebuilt, as most people do, then you probably don't know what is under the hood.
You might be able to get the information by entering the serial number of the PC on a Web site, but when it comes to flashing your BIOS you need to be 100 percent accurate and the information on the Web site could be incorrect.
BIOSes are computer-specific (or motherboard-specific), so you will need the BIOS for your exact model of computer (or motherboard) to update your computer’s BIOS.
Your computer's BIOS - Basic Input/Output System - is a chip on the motherboard which contains enough information to allow it to start up before the main operating system begins to load.
The decision to flash your BIOS should not be taken lightly.
See also: How to install Windows 7 Before you start, heed this warning: if something goes wrong during the BIOS update, your computer could be rendered useless.The only way to know for sure your motherboard make is to pop off the side panel or open the case and take a peek.(Figure A) Look for the manufacturer, model number and a revision number.For the purposes of this article I am going to assume that you understand the risks of flashing your BIOS and have a good reason for upgrading your existing BIOS.If are not familiar with the basics of flashing the BIOS or if you are not 100 percent sure that flashing your BIOS is the right thing to do then please read the companion article Three Good Reasons for Flashing Your BIOS.