I run my pc with the panels off, mainly because for no particular reason it likes to forget that I have any or all hard drives and crash, until I disconnect and reconnect them at which point it can 'see' them again. I don't know why this happens. For one, I don't know if it is good to have the side panels off, for one thought of the fan being useless, and is it absolutely essential for a well running pc? The other and main thing I wonder, is this: Inside my PC is horrendously dusty. Three years dusty to be specific. Especially since I have the feeling it is a main culprit for my many machine check exceptions, I feel I should probably clean it out, but I don't know the best way how. I don't have a can of compressed air, and I don't even know if that would have a chance of... dislodging some of those little chips and pieces on the circuit boards. Basically I just don't know how I would go about effectively cleaning out the dust in a way that would not harm my hardware. Help?