Good morningI want to share this with you folks since I don't think this is quite common.My 4year old system (mb P5Q SE/R, core duo e8400 3ghz, 4Gbyte ddr2 1066 OCZ, Radeon 8xxx card) started acting out one month ago : messages like " a problem has caused fsx to stop working" or even worse blue screen..I started suspecting the power supply which was the weakest component at that time , so I replaced it with a more powerful one,after a little while I started playing with L.A. Noire and things got worse, stutterings when things went right, most of the time I was unable to load the game at all.So I replaced the video card with a new mid range Nvidia model but the problems persisted.Then I noticed that old game that previously worked OK had problems too, so I thought of viruses and I reinstalled windows to no avail...I wasn't even able to install software or patches (I always had CRC errors), the only moment the pc was stable was when I surfed the web or worked with ms office.I blamed the motherdoard, maybe the voltage regulators were malfunctioning...then I tested the ram with memtest86 and... Bingo!My platinum series OCZ ram sticks had errors, one of the sticks was faulty even if the problem was not detected when I started the PC..so the point is don't trust the short post beep and test your memory thoroughly, you may have a bad surprise...I hope this helps..

90% of the time the problems are memory-related. I was having daily crashes until I finally set the memory timing and voltage properly.