Please run through each of the steps under "Common Game Issues" in my signature, and post back with results.
well first off try the 84.21 drivers,and just because your pc runs fine during light tasks with that power supply.when that video card really gets going with something as intense as fear.it might not be up to par.keep in mind when playing games your computer uses way more power than it does just net surfing,or checking email.alot of other programs may be really cpu intense,but games are cpu,and video intense.that kind of strain on a cheap,or low watt power supply can cause problems exactly like what you are describing.it may not be the power supply but if we dont know what kind of power supply you have,and its specs we simply wont know.Well no I wasn't playing online and the brand of power supply is I don't know right now. I don't feel like opening my case. I doubt it's my PCU because I just got it and my PC works fine. My Nvidia drivers are 93.71.