Here's the easy way to do it! Just open up the case, take out the battery...wait 30 seconds or so...then put it back in...turn on the computer and the problem is solved...
Some thing like that. Most of the time BIOS Upgrades are just there to allow people to put the newer processors and hard drives on the motherboard. How ever there is some errors that it also fixes too.
I only flash my bios when I have too. My boss seems to insist that the BIOS's are up to the latest version all the time.
Personally, I do like flashing the bios via DOS and not some of the windows apps that are out there.