Computer is crashing on Dead Space... help please Options

[Parris]

hey everyone, any help is greatly appreciated
basically whats happenin is my PC just crashes roughly 5 minutes into a game. Only one game though which is Dead Space, all other games i have work fine and the thing is i was playing dead space for about a month beforehand problem-free all i have done since is download latest nvidia drivers (180.43) and i'd say that this is related to the problem. when the my pc crashes and i turn it on again it says 'the CPU was previously shutdown due to a thermal event (overheating) etc.' or sumthin along those lines. so i have no idea what's up and if someone has read this and is gonna post a reply, i'm not great on computers so try to make things simple but u know i'm not illiterate either. I've tried re-installing drivers, and the game (deleted all saves etc.) not sure what else to try suggestions are appreciated as i'm sure i've mentioned.

my Pc consists of the following

Gigabyte - 8800 GT
Q6600 intel quadcore @ 2.4 GHz
Windows XP 32-bit
i think the box is foxconn or sumthin
i have a 200 gb harddrive... dunno wat brand or wateva it is though
erm... not sure what else you need to know

Thanks, please help :-) Dead space was joy