this happened to my very old ALBERT(all my pcs have cool names
) in this instance the thermal grease on the processor was too old. i replaced it with new stuff and it solve the problem.
i have since fried the motherboard but oh well thats life :'(
in your case i'd advise you to call the manufacturer if its still under warrenty then the'll do the best they can to fix it or replace it for free.