All you need do is use the telephone activation option. See this link from
my website: http://vistasupport.mvps.org/product...ady_in_use.htm
John Barnett MVP
Windows Desktop Experience
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"SuperTongue" <SuperTongue@discussions.microsoft.com> wrote in message
>I recently received a new computer with all new parts that had Windows XP
> Media Center Edition on it. I had my copy of the upgrade disc for Windows
> Vista Home Premium and wanted to upgrade.
> Well now Windows is telling me that my Product ID has expired and when I
> to re-enter the ID it says it is not valid, even though it is a legitimate
> copy of Windows Vista.
> I did have this installed on another computer but then reverted back to XP
> for other reasons. Is there any way to get my system registered without
> buying another product key?