If your computer is working properly, you do not need to update or flash your BIOS.
In any case, should you wish to, we recommend that you do not try to update your BIOS yourself, but instead take it to a computer technician who may be better equipped to do it. Once the System Information Tool opens, you can check the BIOS version.
At least, that was my experience when working with pre-UEFI motherboards in a lab environment.
The widespread adoption of UEFI in modern motherboards means that usability has been substantially improved, and with that in mind, flashing no longer requires a bootable CD with command prompt loaded.
We used an ASUS Crosshair V in this guide, but the steps apply to any other E-Z Flash-equipped board.
Your boot CD/DVD may or may not help depending upon how the BIOS stands after a powercut or a sudden system turn off while rewriting the BIOS.
Visit the manufacturer’s site to download the BIOS update, for instance, if you own a Dell laptop you can head over to Dell.com, or you could use Dell Update Utility.
Before you begin, make sure that you have power backup while upgrading the BIOS.
Because if the computer turns off during the process, the BIOS may be corrupted and you will need a technician to fix it.