I just installed a new game called "TOCA Race Driver 2" on my pc (with Windows XP Professional edition and SP2) the hardware requirements for the game are too low (32 mb graphics, 800 mhz cpu, 1.2 gb space etc) and my pc is fast enough with 1 gb ram, 2 ghz cpu, 128 mb graphics card-ATI Radeon 9200 and 120 gb hdd. but whenever I am playing the game my pc shuts down automatically without any reason whatsoever. I have Norton Internet Security installed and running well with no virus etc. Can any one please tell me as what could possibly be the culprit? Thanks.