I strongly advise against using @BIOS or any other Windows-based BIOS updating program. It operates via Windows and downloads directly from the internet. If your connection is bad, Windows crashes or the connection drops you could totally kill the board and it will be dead.
You need to be unlucky for Windows to crash or the program to stop responding while flashing the BIOS. But updating via Windows is a risky variable that can be avoided altogether. Nobody wants to be cursing their bad luck when the avoidable and unlikely could have been avoided.
Updating the BIOS is probably the only update most people do that may result in a catastrophic failure of their rig. It should be done in the safest way possible. I really don't understand why Gigabyte, Asus and other manufacturers make these programs that carry this risk (however small). It is, in my opinion, bordering on the negligent.
I have never had a BSOD or Windows crash since Windows98 (to my recollection) that has not been caused by me stress-testing hardware or experimenting with heavy overclocks. But I would never update BIOS via Windows as I want to keep the risk to an absolute minimum.