page_fault_in_nonpaged_area on vista

Hp lap top, had my first bsod. had not changed anything in 6 days just surfing web. It was slow, and rebooted. bsod.
I am in safe mode with network now, if i load into reg vista, it bsod. Here is what I have tried so far. not in any real order

Restore to last up date 5/7 Failed
restore to 5/4 failed,
Restore to day before I added antivirus software 4/29 failed
Ran spybot, safe mode
Ran cc cleaner safe mode
Ran chkdsk c:/r
8 bad sectors.
Finally here. This is my work cpu, and i need to get the invoicing out. I have it backed up. I can access it through here. I will say this larger font and funky screen are easier on my eyes. Lend me what aid you can and it will be greatly appriciated.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: 50
BCP1: FFFFFFFFFFFFFFFF
BCP2: 0000000000000001
BCP3: FFFFF8000238D9D4
BCP4: 0000000000000000
OS Version: 6_0_6002
Service Pack: 2_0
Product: 768_1

It is probably a driver problem or hardware or improperly installed RAM. Perhaps a conflict of programs, probably not a malware. Have you installed any new hardware? a ram stick ? playing online game? ... If you do not remember when it started, then you will have start a repair on your vista system.