For years, the Basic Input Output System (BIOS) provided the core functionality necessary to enable a computer's hardware when it's first turned on.The BIOS also jumpstarted the operating system's boot process once that hardware was enabled.

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What do Windows 8 and Windows Server 2012 offer that no other Windows operating system can?

They support the Unified Extensible Firmware Interface, the long-overdue replacement for the ubiquitous BIOS that has defined PC startup operations since the 1970s. The new ecosystem represents a significant step forward for PC operations, but enterprises planning to deploy Windows 8 desktops should understand what UEFI is all about before rushing into any decisions.

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You will need to create the bootable USB on a working Windows computer. Type "peinst" and press "Enter." A new window will open.

Select option "1" in the menu to access the "Change source path" option.

Type "c:\pebuilder#\Bart PE", again replacing "#" with your PEBuilder version.

Select option "2" and press "Enter." Type the letter assigned to your USB drive, followed by ":", then press "Enter." Select option "5" and press "Enter." When the computer has completed the process, Windows XP will be installed onto your USB drive. Enter the BIOS boot menu by pressing "F2" during the BIOS start-up.

Updating your computer's BIOS is usually a relatively easy task.

However, using normal BIOS upgrade programs may be impossible to run if your Windows operating system will not boot up.