Thank you nuhi. Perhaps you're right, but if it already has SP1 on it, then why would the "repair your computer" option fail and tell me that I have the wrong version of Vista? How can I confirm this? That's different issue now, I am not in charge of Vista recovery console. First make sure that the content of the DVD is actually the same version as installed. Why Vista recovery didn't detect...well did you install XP on different or on the same partition as where your Vista was? Can you run some sort of command like to initiate boot fix, like Vista WinPE or Recovery Console?