I am running windows xp on an nec versa sx laptop....which is made for windows 98/NT. i noticed that it would get quite hot at times, and i would shut it off to let it cool. however...recently i have not even been able to turn the laptop on. when i do, it makes a loud chirping noise and will not boot into windows. i tried re-installing windows, then it will boot into windows, but it will run very slow and only for about an hour, then the computer beeps and a blue screen pops up saying that there has been a fatal system error and it is dumping memory and shutting down to prevent damage. when i try to restart, it chirps and will not boot into windows again. any help here?