XP x64 Edition - Broken PC >.<

okay
back to one of these. lol
i was downloading drivers for my Mobo Sound, and a BIOS update driver for my MoBo.
basically, installed sound driver and BIOS driver, restarted PC, and now it won't Load up. just keeps going on a loop restarting.
kindof.
basically, after going through the "press F6 For BIOS Screen" and "F4 for RAID screen" screens, it goes onto a new screen saying

some ****, then
"Safe mode"
"Safe mode + Networking"
"Safe mode + Command Prompt"

"last known working Config"

"Start as Normal"

i've tried all, none work.


so, i tried reformatting, load up reformat disc, starts loading everything.
then get's stuck on "Setup is starting Windows"

and just stays on that

i'm screwed, need help >.<

i have pics of both screens if needed.

my System is:

Windows XP x64 Edition O/S
ASUS A8N-SLi Premium Mobo
AMD Dual Core 4800+ Processor
4GB DDR Ram
Dual nVidia 7800GTX
Onboard Sound


anymore info needed, just ask