Dusted it out with a compressed ait can?
Let me comment your post is too light on details. You noted the make/model, but for best effect supply a short detail and the age of the machine.
IF IT'S IN WARRANTY, use it.
I have an Hp ze5600 and it used to once in a while go to this blue screen which said system dump and restart.
Now it's doing it alot, and I have no idea what to do