One thing to remember is that if you make any changes and save them....and the change caused an issue you didn't expect...is to remember the previous setting so you can revert back to it.
Also, let us know the vendor and version of your BIOS, please.
I have an ASUS P5KPL AM SE motherboard, no idea of my bios. I'll write the name and version down. I'll also write down any settings I find before I start. Good to keep that with me.
@bigguy: Ah, good to remember that. I'll keep an eye on that switch and write down the directions to it

Oh by the way, is there any way to test a BIOS in a virtual machine? I've got Virtualbox as virtual machine software.