Friday, June 24, 2011


BIOS is an acronym for basic input output system. As the name suggests this built in software is responsible for running all the major input and output devices like keyboard, monitor and disk drives. BIOS is actually the first software which actually runs when one turns on his PC or laptop. When we turn on our PC, BIOS executes the startup program placed either on the CD or a hard-disk and then turns on the PC giving the control to the operating system.

During the startup procedure, the BIOS conducts a test known as Power On Self Test (POST) which detects all the devices and programs needed to start the system. If any error is encountered during this procedure, the message is relayed to the BIOS.

BIOS resides on the ROM chip which protects it from any failures. As a user, you can do changes in BIOS configuration and compatibility with components by pressing a key as the computer begins booting which is generally the “Delete” key.

Most PC manufactures now use Flash BIOS which allows user to update the BIOS settings and the version itself once the new updated version has been released by manufacturer.

BIOS setup even allows you to keep a BIOS password to prevent unauthorized access and prevent anyone from tampering with your system’s settings. But remember that BIOS password is different from your operating system password.

If one is not certain about the BIOS settings then a person must not fiddle with it, as any setting gone wrong can hamper the functioning of your computer.

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