BIOS issues???

Hello all,

I powered up my PC this morning and was greeted with a "please reset CPU or memory frequency in CMOS setup". If I try to advance beyond the screen by pressing "enter" I get another screen saying that Windows could not start and I get options to start in "Safe Mode" (three different safe mode options), "From last known good configuration", and "Normal". I've tried selecting all of them and I get the Windows boot screen for about a second before it flashes to the blue screen of death and then reboots my system which starts the sequence all over again. I don't OC, this is not a knew build, and it's been working fine up until this morning.

Intel Core 2 Duo 2.4
4GB Corsair DDR2 RAM (2 x 2GB)
BFG 8800GTX
Asus P5NSLI
Sound Blaster Extreme Gamer

I Googled the message and a lot of the descriptions that I found were related to hardware settings in the BIOS. So far I've:

1- Removed the sound card, video card, and each stick of RAM; all one at a time and it didn't make any difference.
2- I cleared CMOS by killing power, moving the jumper, pressing the start button, moving the jumper back, etc.
3- Went into the BIOS and returned settings to default.

None of this has worked so I'm kind of stuck. I don't know if I've got a HD or Mobo problem or if there's just some settings in BIOS that are still screwy.

Any help or suggestions would be appreciated!!