as me and James has mentioned, your BIOS needs an update. ASUS has provided some utilities, as I think you can use them inside Windows. It should be something like a DOS process running. But still we'll need to give the warning even though it seems easy-
Cancelling a BIOS flash, or messing up with a configuration (if any) might break your machine. Be careful what you choose, and don't configure without having a little basic knowledge on the areas. Ask questions during the installation if you have any.
.. we just have to do it.