my computer has been acting very weird lately. i have gotten several BSOD saying ''MEMORY_MANAGEMENT'' lately, also just this morning, the screen went totally blank and then the computer restarted by itself, it did that about three times before i could finally log in. maybe it was a coincidence but when i stopped windows(7) from alternating my wallpaper it stopped it. also, i have not gotten a bsod since i have stopped shutting down totally, instead i have just put it to sleep. do you think this is more likely a hardware problem or software? i don't wanna reinstall windows if it will not do any good, nor do i want to buy a new hard drive only to find out it was the motherboard. any help you can give would be greatly appreciated. thanks