Last night the tower on our pc set up burned out. I was in bed but the Mrs says it died then smelt of burning plastic. When my son came over he pulled the tower out and the ventilation grill was absolutely chokka with dust, he reckons that was poossibly the reason. Luckily we still had the tower from our previous pc.
Just a suggestion guys, pull your pc components out and have a look, because you can`t see it don`t mean there`s no dust there. I might be saving you a few quid.