Updating bios vista
Dell recommends updating the BIOS as part of your scheduled update cycle.
Like Operating System and driver revisions, the update contains feature enhancements or changes that will help keep your system software current and compatible with other system modules (hardware, firmware, drivers and software) as well as providing security updates and increased stability.
If your Dell PC or tablet supports BIOS recovery, you can recover the corrupt BIOS by using the BIOS recovery method on your Dell PC or tablet.
Some Dell notebook computers need to have at least 10% battery charge before you begin the BIOS update.
Note: Occasionally you will need to install a previous version before updating to the latest version.
The BIOS also contains instructions that the PC uses to perform basic instructions, such as whether to Boot from Network or Hard drive, which drive to Boot from first.
BIOS is also used to identify and configure hardware components in a computer such as the hard drive, floppy drive, optical drive, CPU, memory, Plug and Play devices etc.