Hi everyone, My friend's Windows XP system recently overheated. He's tried cleaning the system inside out hoping to get rid of the clogged dust inside, which could possibly be the cause of the overheating. Unfortunately his system is still not functioning. At first he could login for 20 min. or so and the system would auto-shutdown itself after the 20 mins, then after that situation after a while he began geting a DOS-screen saying the computer has overheated. Now it has just gotten worse and the system will not startup at all. Any ideas as to how to fix this? Replace the parts maybe? What parts are usually the culprit? On behalf of my friend, Thanks a lot guys for any help.