Am having a problem with my alienware x51 I was able to run skyrim on ultra and minecraft on high settings and my other games aswell but now I can't help last thing i remeber downloaded was cheat engine before i had this problem??? My pc specs are Windows 7 home preuim, 4th gen intel core i5-4430 processor(6m cache, up to 3.2GHz), 8Gb of ram, 1TB hard drive Nividia geforce gtx 645 1gb graphics.... i also clean install my pc twices and made sure i updated my graphics card and everything else and nothing am still having the problem??? if anyone can help me I glady apphercate and srry for bad spelling