Computers

What is BIOS in Computer? How to Update BIOS?

Do you know that BIOS is the first thing that runs when you turn on the computer? It is a bunch of code which helps use devices such as the mouse, keyboard, monitor, etc. on our computer and so on. If you want to know more about BIOS, what is BIOS, functions of BIOS, how to update BIOS, then this article is just for you. Today’s article of is purely dedicated to BIOS and how to update BIOS. Here we go…

What is BIOS in Computer?

BIOS stands for Basic Input Output System. You must know that BIOS is one of the most important parts of a computer. And without BIOS you can’t turn on and use your computer. So, you can say that it fills life of a computer without which a computer is just a box with so many devices and chips attached to it. Let me explain BIOS in detail

Actually, BIOS is a program that is stored in a chip placed on the motherboard of a computer. Whenever you buy a new PC then it comes with it as it is an integral part of a computer. You must be wondering about why it takes a little time for the computer to load when you turn it on, it is because of the BIOS. Whenever a PC is turned on, then the first thing that happens is checking and loading all the devices attached to the computer for its proper functionality and this is done by the BIOS.

How to Update BIOS

When you turn on your computer BIOS is the first program which runs and it checks the RAM and processors if they are working fine and then the I/O devices attached to the computer such as the mouse, keyboard, printer, etc. if they are in their place and working properly. After that only, it loads the operating system in RAM (Random access memory) of your system and then the computer is turned on completely. So, if you are thinking that BIOS only controls the input-output system as its name suggests then you are wrong because BIOS does a lot many things. Let’s get to know some of the main functions of BIOS.

Functions of BIOS

BIOS POST (Power On Self Test)

The first function of BIOS is POST. POST stands for Power On Self Test). Whenever a computer boots, the first thing that happens is checking of all the hardware and devices attached to the computer for their working and compatibility. On turning on the computer you must have heard a beep sound. That is the indication that the POST has been successfully passed. But if it fails then the beep sound is not generated instead it will show an error. This whole process is performed by BIOS.

Bootstrap loader

Next ting after POST, BIOS loads the operating system in RAM. This is done with the help of a program called bootstrap loader. This bootstrap loader loads the operating system and starts computer.

BIOS setup system utility

BIOS reads all the information and the parameters from CMOS. CMOS (complementary metal oxide semiconductor) is an efficient storage devices which are used to construct NVRAM. NVRAM contains all the information regarding a computer such as settings of the disk memory, DISK type etc. are stored in this.

System service routines

Another major function of BIOS is to provide several software routines. Those software routines can be called by the major and high-level software such as DOS, Windows etc to perform their functions. BIOS programs control all those tasks which involve accessing the system hardware. It reads and writes from hard disk, processes information received from devices and so on.

How to Update BIOS?

We discussed the functions and some little information about BIOS. Now that you have understood what BIOS is then here is the complete method to update BIOS of your system. To make the computer and operating system work properly you need to make sure that the BIOS is up-to-date. And if it is not then you should immediately update BIOS.

And if you are searching for the complete procedure to update BIOS of your system then this section of the article will help you. It contains the complete step-by-step guide to Update BIOS. Let’s get started.

I. Know the current BIOS’s version

In order to update your computer’s BIOS you will need to find out the current BIOS version and then only you will be able to update BIOS. There are many ways by which you can find the current version of BIOS of your computer. You can follow any of the ways to find yours.

1. Using system information tool

First, open the Control Panel and search for system and security. Then click on System & security and you will find the Administrative Tools option there, simply click on it to open the same. It will redirect you to another window where you can find System Information program. Just double-click on it to run the program.

How to Update BIOS

In the System Information, you can easily find BIOS Version/Date.

2. Using registry editor

  • Press win+R, type Regedit and hit enter.
  • Now follow the path to open the desired folder HKEY_LOCAL_MACHINE >> HARDWARE >> DESCRIPTION -> System >> BIOS
  • Now at the right sidebar, you fill find two files named SystemBiosDate and SystemBiosVersion. The values of these files provide you the information of your computer’s BIOS.

II. Check for updates

Now that you have the information about current BIOS version, you can now start the process to update the BIOS of your computer. Check if there are updates available for the BIOS and you can get this information from the website of the manufacturer of your computer’s BIOS.

How to Update BIOS

Once you have successfully landed on the manufacturer’s website then do some research over there to find out the available updates for the BIOS. By using the search box on the website try some search terms like BIOS download, utilities, Firmware, etc. If you find that there is a newer version of the BIOS then simply download it.

III. Prepare your system to update BIOS

Now that you have got the newer version of BIOS for your system. It’s time to prepare your computer for a proper and successful BIOS update. If you are going to update BIOS from Windows directly then make sure that every antivirus program is disabled and not running.

There should be a continuous and proper power supply to the system when updating the BIOS. So, if you are updating BIOS in your laptop then it should not be running out of battery. Same way, if you are updating BIOS on the desktop there should be UPS to avoid the sudden cut off power. So, prepare all these things.

IV. Backup the current version of BIOS

After setting up the environment for BIOS update, you need to keep the backup of current BIOS of your system. Keeping the backup of the current version of BIOS will help you if something goes wrong in the BIOS update. If there occurs any error during updating the BIOS, you can easily restore it from the backup.

To backup the BIOS you can use a tools for easy and quick backup. One of the great tools to backup BIOS is Universal BIOS Backup Toolkit. Download and install this toolkit on your system and backup the BIOS.

V. Update BIOS

Now everything is ready to start updating the BIOS. So follow the below steps to update BIOS of your system. There are three ways to update the BIOS of your system viz. Update BIOS from BIOS, Update BIOS from Windows, and Update BIOS from DOS. Let’s discuss all of these three ways.

I. Update BIOS from Windows

Updating BIOS from Windows is the easiest method of these three. To update BIOS from Windows, just open the downloaded folder you got from the BIOS manufacturer’s website in step II. Now in the folder, search for the executable file. This files will start the BIOS updating process. So, double-click the executable file. After that, simply search for a button named Update, Flash or run. If found click that button and the updating process will start. It will notify you when the process is completed.

How to Update BIOS

II. Update BIOS from DOS

To update BIOS from DOS you will need to create a bootable drive and then copy the BIOS files on it. After that shut down your system and then reboot it by using that bootable drive. After that follow the instructions and you will also need to run a specific command. Then simply wait for the completion of the updating process of the BIOS.

III. Update BIOS from BIOS

Some manufacturers provide this feature. The utility provided by different manufacturers for updating BIOS from BIOS have different names such like for Asus Motherboard the name would be EZ Flash, Instant Flash utility for Asrock motherboard. For using this utility, you will only require to copy the BIOS files on a removable storage device and connect them to the system, they automatically detect the file and start the updating process.

So, this was the complete method to update your computer’s BIOS. You should always update the BIOS carefully and never forget to keep a backup of the BIOS before updating it. If you found any difficulty in how to update BIOS section then let us know because it is important that you update it correctly. Although, the steps are very easy so there should not be any problem.

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About the author

Shivani Srivastava

Shivani shrivastava is an active tech blogger. She has graduated from Delhi University. She has contributed a number of great and informative articles to the internet. Apart from blogging she loves music, games, puzzles and reading. Share your views with Shivani in the comments.

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