Here's an intresting one. I used Notron Ghost 2003 to back up my old IDE 20Gb drive to DVD then installed a new 200Gb IDE drive. Formated it by installing windows XP Pro which worked ok. I then used the backup DVD and put all the data back on. When I rebooted just after the pc checks if it needs to boot from the CD's it stops dead and states "Error Loading OS". Now I put in the backup DVD to reinstall it but forgot to put the Notron boot floppy disc in and it boots straight in to windows and my PC is as it was with the old drive! Wierd or what. Now I'm guessing that the MBR has some how been altered but I have no Idea how to fix it, if this is the error. Any ideas would be greatly appreciated as I really don't wnat to have to reinstall 35Gb of data. Regards, Bruce.