4 months ago I bought a new gaming pc, it worked perfectly (i played splinter cell blacklis , sims 3 , lego, assassins creeds, battlefield 3) until like 4-5 days ago i played CoD Ghosts , i played like half an hour with recommended setting and it shut down .so i decided to not play this game anymore , i started the sims 3 and the same things happened , so i downloaded Speccy (http://www.piriform.com/speccy) and it turns out my pc was running at 75° C when gaming , and at 60° C when iddle . i cleaned the coleers , and now is running at 40-50 °C when iddle , and at 60°C when gaming , but it still shuts down, HELP PLEASE