Blue Screen Problem

Hi guys
i have desktop computer. it has core 2 duo processor ,4 gb ram , 1 tb hdd ( 500 + 500), ati 4650 graphics card . i use it only for gaming and watching movie. it run 4- 8 h at once. but recently my pc detected problem . it auto restarted with blue screen .
i setup my windows 2 times but didnt get solution. please give me better solution.

See original post by ayonbit