Okay I am having the hardest time to figure out my computer. I have several problems with it that may all boil down to one simple problem. The only thing is I dont know what it is. Here are the problems that I have been having. 1. My dvds are now choppy and stuttering. My downloaded videos are fine but my dvds are cleaned and still having problems. I installed 1gb ram in my computer and everything worked again. I do not understand why I need more ram now when it worked great before. I played my videos and after a while it seemed like the problem came back again when the computer fan went louder. I am guessing it got hot inside. 2. I seem to be having a problem when I turn on my computer. At times I will turn it off and the computer light stays on but the monitor hibernates. I will boot it up again and only the fan and the light go on but the monitor does not activate..it seems like its on sleep mode. I mess around with it by turning it on and off and then it says "no signal". I then find myself cold booting it afterwards and then everything is fine. This is a pattern that always happens to me. (Turn on, Nothing happens, Cold boot, Something happens...ect.) 3. I feel this is a heating issue, but why all of the sudden do I have this problem. I also do have a new video card that I installed months ago but it has worked all up until now if that is the problem. 4. Can anyone help me out with this. Maybe some suggestions? Could it be a video card problem? a heating problem? virus and if so why now?