What motherboard are you using and what BIOS version? Which EXPO profile are you running?
Just checked, I have BIOS version 1616 and the EXPO Profile (the one I used at least) just gives me enabled/disabled options.
I haven't accessed/updated the BIOS since I've had the computer (prior to a couple of days ago after my problems started). I tend to leave that stuff well alone. The only things I have ever done to my PC is updated Windows/Graphics drivers.