My PC was making weird noises lately... like the fans would go TOP SPEED even if NOTHING was running. But it wasn't crashing at all. So I thought the air vents were probably dusty... So I open it up, and yeah the front panel was all cluttered with dust. I clean that up... Few hours later, computer suddenly shut down while playing Diablo 2... Well, the computer was still powered, but the screen was off, and the fans were going from slow, very slow, very fast, fast, etc. when I tried to turn it back on. Weird stuff. I open it up again, check the connections... power it up... it works. But after that, it crashed 3 times, several hours apart, while the computer was idle... same type of crash, screen is off, no response from anything, but rebooting worked. I think my computer LIKED to be covered in dust lol. It was probably pissed off that I screwed with its environment... Anyway... I got scared that my computer blew up a couple of times :/