If your talking about the product key, i read somewhere in this newsgroup of
someone having the same problem and someone suggested downloading a program
that will retrieve the key and tell you what it is. I'm sorry i don't
remember what the name of the program is but if you search for product key
in this newsgroup i'm sure you'll find it.
Jeff
"AP123" <AP123@discussions.microsoft.com> wrote in message
news:C0F6AC4F-DFAE-4679-A52B-A551967D8A7F@microsoft.com...
>I upgraded to Ultimate from Vista Business and did not receive a new serial
> number.
>
> When i need to do a re installation, how will I get back to Vista
> Ultimate?