Go to the website of the company who makes your laptop or desktop. The majority of these sites have a portion of their site they devote to updates. Look in this section to locate your BIOS updates. When you find the file you need, download the BIOS to your computer's hard drive.
Go to Biosman to download and install the Phoenix BIOS flash utility software. This software allows you to read the data your BIOS file contains.
Flash your BIOS via USB storage device. Copy your update to the USB drive. Then, modify the boot order of your laptop or desktop to begin with your USB drive. Push "F2" or whichever key prompts you to enter your BIOS when you reboot your system.
Double-click the BIOS file you just downloaded to run the upgrade procedure.