by 
The Curious Bag
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The basic input/output system, or BIOS, is the instruction set a computer uses when it's first started. Because of ever-changing technology, the BIOS often needs to be updated.
Where the Bios is
The BIOS is stored on the ROM (read-only memory) chip on the motherboard. It often has a shiny silver sticker on it to help identify it.
What the BIOS does
When a computer is started, the BIOS is responsible for testing core components like the processor and memory. It collects information about the hardware in the system and assigns the hardware system resources. It then turns this information, and control, over to the operating system to finish booting.
Why Update the BIOS
Since the BIOS collects information about hardware, a new piece of hardware may not be recognizable by the BIOS. If that happens, the hardware will not work. Updating the BIOS should allow it to recognize the new hardware.
How to Update the BIOS
Manufacturers have programs that can be downloaded to automatically update the BIOS.
Caution
Follow updating instructions fully. If the BIOS is damaged, the computer will not starts. In extreme cases, the BIOS could be damaged beyond repair and you'll need to get a new computer.
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