I've had a problem that happened two weeks ago. When i attempted to start up my computer, i got the message "windows could not start because the file ...../system32/ is either missing or corrupt. Please insert the original setup cd-rom and press 'r' to repair." I tried to do that, also tried to format the hard disk and re-install windows xp pro a number of times but the message is still ther. If it doesn't give me this message, it gives me another screen saying if i would like to start windows in safe mode or last known good configuration or start normally, after many attempts of entering, windows finally starts. After that it is fine for the rest of the day. I even tried putting in a new hard disk but still get the same message. Can anyone help.