I cannot get windows xp professionl to start. I get "Error loading OS" I have tried booting from the XP cd - it comes up with the blue screen saying Windows setup, then runs through several steps saing setup is loading files, until it gets to loading fat disk, then ntfs disk, then it automatically reboots and starts through the same loop again. I have swapped out the hard disk and the memory and it still does the same thing. I don't have a system recovery disk. Help, I don't know what else to do!!