Bios

Bios is the Basic Input / Output System. The BIOS is a software construction that determines what a computer can do without accessing programs from a disk. In PCs, the BIOS contains the code required to control keyboard, display screen, disk drivers, communication and large number of other functions.The BIOS is usually stored in a ROM chip (Read Only Memory) that comes with your computer. This ensures that the BIOS will always be available and will not suffer damage with disk failures. Current models of PCs are equipped with BIOS stored in flash memory (nonvolatile memory that can be erased and rewritten) that can be updated if necessary.

Updating Bios Can be very important in some cases since it can solve a few hardware conflits.
Be aware that a BIOS update is a very dangerous thing to do if it's not done correctly.
In the next days i'll start explaning what is important in BIOS for you to know when repairing your computer.