That there's some strange Juju, Gary! I'm particularly concerned about the lockup when you attempt to save changes to the BIOS. I'm surprised you don't have a laptop-shaped paperweight at this point.
If I were in your situation, I'd attempt a CTRL+HOME Crisis BIOS Recovery (see
http://rog.asus.com/forum/showthread.php?32835-Possibly-bricked-G46VW) to see if it straightens that bad boy out.... It's possible that itself may brick your laptop, but it seems like an RMA for Warranty repair is the only other option.
I might also run memtest86+ for at least 3 passes to confirm your memory and CPU memory controller are sound.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT