BIOS stands for Basic Input Output System .
All computer hardware works with software through an interface.
The BIOS is low-level software that handles the main communication tasks between the processor, memory, system board and expansion cards. The operating system and programs running on your computer use the BIOS to simplify their instructions and reduce their size, giving a more efficient system. When you download a new BIOS, the flash utility will reprogram your flash memory. Due to this optimization, communications errors may occur between, for example, any expansion boards you may have installed and the PC's main components. A new version of the BIOS may correct this problem.