*Actually, computers (and all other mechanical devices) are inhabited by tiny little elves and gremlins who control all the machines functions.*
I envision it as a tiny monkey (maybe like one of those golden lion tamarind that look like little bearded old men) inside my hard drive furiously switching wires like a 1940's-era phone operator. Sometimes he gets tangled up. Other times, you tell him to unplug something but he can't get the plug out and he's in there with his little feet planted against the wall of the drive, yanking for all he's worth.