i have a computer that is running windows 2000 pro. It was booting fine but all the sudden when i go to turn it on. it will only boot up half way like it would boot up to the screen where the computer checks the memory and for all the other devices and stop or it will get up to the windows 2000 pro startup screen and do nothing. i have tryed booting in safemode but it does the same thing. how can i fix this?what could be the cause of this?