I Usually put it on a wooden surface like a desk.
system model: XPS M L530. and also if its needed. its a windows vista home premium 6.0.
Brand: Dell Vista
Fans: I have no clue, If any there may be one on the bottom, inside the comp.
How long this has been accuring: Since I had this computer. but, only one computer game doesn't make it shut down, it's age of mythology. but, It may just have been really cold that day.