The BIOS contains in it all the codes that are required to run and control the keyboard, mouse, screen display, hard drive, and the numerous functions that the computer can function. In other words, we can say that the whole computer is dependent on it and does all the functions through it. The BIOS is usually placed in a ROM chip that comes with a computer in the central processing unit. It helps the computer to boot itself. BIOS is known as the third software after the operating system and the other applications, it helps the computer to operate successfully.

There are numerous functions that the BIOS performs but among them the most important role of it is to load the operating system. When you turn on the computer, the first instruction that is executed comes from the BIOS. Some of the other tasks that the BIOS perform are that it makes sure that all the different hardware components that the CPU contains are working properly. Many chips have there own BIOS card, so the other function of it is to activate all the other BIOS chips. A computer occasionally needs to update its BIOS. It is required to be changed according to the advanced operating system.

At many times to change the BIOS chip is very difficult, since it was attached to the motherboard; then came the trend of upgrading it. Since the BIOS is stored in the ROM, changing it is a bit tough, and that is why many people prefer to upgrade it. To change the BIOS you will have to get the help from professionals. You can even check out the various sites where the manufacturers provide the facility of up gradation. After you have found the one that you have been looking for, you can download it; copy the program, along with the BIOS update on a disk or a floppy disk.

Modern PCs have flash BIOS, which mean that the BIOS memory is installed in a chip and can be easily upgraded whenever required. The BIOS is found in a standardized form, so that is why the entire PC has almost the same setup. Before upgrading the BIOS be sure that the setup that you are about to change is compatible with your computer. Or else you can corrupt the whole BIOS, which means that you will not be able to start your PC, so, before you are about to upgrade it, do not forget to ask the manufacturers and find out what will be mores suitable for your PC. Go through the various sites where they allow you to download the software and guide you through all the set up that you may require.