Ironically, I was playing crossfire, and I got a blue screen, and then restarted my computer, and now my computer just shows a blank screen, but everything still functions normally, the sounds, fans etc. Then after about 5 minutes, it turns off. This has happened before, and I took it to the computer shop and they said it was a virus, but it cost me 120$ to fix it.
Im no good with computers so i dont know how to look at my graphics card and stuff, but here is a utube video of whats happening: