I am using Thinkpad T43 and the Windows system had a sudden death today for three times. I bought this thing three months ago and today is the first time the sudden death happened. I am wondering if this is the laptop problem or a Windows problem. Please give me advice on how to fix it. thank you! (I scan the system files and no error comes out.) I encountered numerous problems since I bought the laptop. don't know why IBM is so unreliable.