BIOS Full Form – What Is The Full Form Of BIOS

BIOS full form is Basic Input Output System. The BIOS is an integral part of the computer system. BIOS is a type of firmware of a PC and is used during the booting process (start-up) process of the PC.

This is the first software which become active at the when the PC is turn on. While loading the operating system, the BIOS identifies and configures all the hardware of the computer such as RAM, processor, keyboard, mouse, hard drive etc. 


The BIOS is the most critical part of a PC. So only update the BIOS if necessary, as it is a complicated process and if an error occurs in it, then it will make your computer unobtrusive. Updating the BIOS often resolves several issues. To update the BIOS follow these steps –

(1) Check the version of your BIOS in Windows – There are several ways to detect the BIOS version of a computer’s motherboard.

i) Restart your computer and go to BIOS. Inside the BIOS, you will find the version of BIOS used by your computer’s motherboard.

ii) Press Win + R key – type “Msinfo32” in the search bar and click Ok. This will open System Information Windows. In it you will see the version of BIOS.

iii) In the command prompt, “systeminfo | type findstr / I / c: bios.

(2) Check if there are any updates of BIOS available – After you get the version of BIOS used by your computer’s motherboard, now is the time to find out the update version is available. If your PC is branded, do a search on your computer manufacturer’s web site and if the PC is not branded, search for updates on the motherboard manufacturer’s site. And then download the correct BIOS update file.

(3) Read the document – Before updating the BIOS, you should read the update’s documentation file carefully to prevent your PC from becoming  unbootable.

(4) Update your BIOS – To update the BIOS, quit all programs and run the exe file. This will reboot the PC after the install corner and update the BIOS.

Note: Most BIOS update programs include a backup option for their current BIOS version. If such a feature is available, backup your existing BIOS version before updating.


When the computer is on, the BIOS does many things. This is the general sequence of:

  1. Checking CMOS Setup for Custom Settings |
  2. Loading interrupt handlers and device drives.
  3. Performing Power-on self-test (POST).
  4. Display system settings.
  5. Deciding which devices can be booted.


If you are having trouble booting your system, you can reset your BIOS settings to default.

  1. Press and hold the power button for 10 seconds, or until your system is completely shut down.
  2. Restart your computer.
  3. Press the BIOS key of your computer.
  4. Choose the “Restore Defaults” option.
  5. Finally press F10 Press the Enter key to save all changes and exit the BIOS screen.

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