Dude check out some antivirus software. I had MANY of these problems at 1 time or another.I would fix one and another would pop up, made me crazy no nascar 4 for like 4 months. No upgrades for OFP. I was ready to try herion. Got this norton 2002 had boo-ko virus problems,cleaned and is upgrading and playin fine. Oh BTW I also run an AMD 1.4 Anyway my 2cents worth is in.And I am out of here. Good Luck.