Ok, so here's my problem. I got a new Dell desktop computer about 2-3 months ago. It has a Core i5-750 CPU and a Geforce GT 220 graphics card, with a lot of ram and space (over 600 GB of hard disk space i think). Anyway it's a relatively powerful gaming computer. I first installed Batman Arkham Asylum and that ran very smoothly. However, occasionally i had a problem (not with this game, i had it with the online game FusionFall by cartoonnetwork which i was just trying out as well as Battlefield Heroes from EA) that after a little while of playing, my computer would suddenly crash. Graphics board stops sending signals, screen goes black, monitor enters power save mode, sound either stops or gets stuck on one sound repeating over and over again. Before that i had a problem where my screen would go black for a second and then come back, and i would get an error message: "Nvidia Kernel Model Version 186.34 stopped responding and has now recovered". I wasn't sure if the two problems were related or not. I bought a game called Transformers War For Cybertron which ran fine for a few days, then started having the same problem with crashing. The problem got worse, eventually i'd play for 5 minutes before it crashed. My computer exceeded the requirements, so that shouldn't happen. Updated every driver but nothing worked, so Dell sent a technician who replaced my graphics board and fan. My computer played the game fine, although i still had the problem with the nvidia kernel model occasionally. No crashing for almost a week. I come home in the evening after being 5-6 hours out of the house, open up transformers, and i have a new problem. I try to play transformers which had worked for the last week and had even worked for an hour and a half that morning, but it gets a BSOD the second i try to start an online match. Same thing with Solo-campaign. I try Batman which has the same problem, i can't play either game without them BSODing. However, BSOD is new, it always was just a crash before. I haven't seen the kernel problem in the last several days, i updated my drivers and it went away. I have no idea what to do, Dell Support is sending a technician again to look at my computer. Does anyone have any ideas? Let me know if you want clarification on something.