Filthy tower
I built this system for a friend of mine two years ago, .. he phoned the other day to say it would'nt boot up so I collected ir and took it home, . . I could'nt believe the amount of dust inside, . . his house isn't like this I hasten to add, . . but PC's are notorious for this, they have 2 fans drawing air into the tower case and dust floats as you know.
I don't know how the CPU didn't burn out, he's very lucky indeed.