The ASUS Update is a utility that allows you to save, manage and update the motherboard BIOS in Windows® environment.
The ASUS Update utility allows you to:

Save the current BIOS file
Download the latest BIOS file from the Internet
Update the BIOS from an updated BIOS file
Update the BIOS directly from the Internet, and
View the BIOS version information.
You need an Asus motherboard in your system.
Rules for Safe BIOS update:

For safety reasons, always use the most updated BIOS utility!
Do not overclock the system/CPU during BIOS update!
Load "Setup Default" in BIOS menu before BIOS Update.
Make sure you have "Administator" privilege on your Windows system (WinNT4/2000/XP).
Close all application programs under Windows.
Disable any existing Anti-Virus applications in the system.
Reboot the PC after the BIOS update is complete.
Switch on the PC and load "Setup Default" in BIOS again.