A full retail version is capable of doing both upgrade and clean install. I
take it the machine you are upgrading is a 64bit machine and not a 32bit? 64
bit software will not run on a 32 bit machine. I ask because you say you are
running XP Pro SP1.
John Barnett MVP
Windows - Shell/User
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"ukadamwest" <firstname.lastname@example.org> wrote in message
>I running XP Pro SP1 and have just purchased Ultimate X64 full version, and
> want to do an upgrade so hat i dont loose and have to reinstall all my
> installed software.
> I have purchased a full version of Vista Ultimate X64, does this have the
> option to perform an upgrade install, or should i have purchased an
> version of it instead ??