Thanks, guys. This is illuminating, and I had wondered myself how the
upgrade XP disc would recognize Vista.
It seems like the crux may be that rather than a simple XP Pro disc, what I
have is a system with manufacturer installed XP Home, and the upgrade XP Pro
disc (which I had gotten to upgrade an Me system, but went for a new system
instead and never used). So I don't really have the full "downgrade media".
And XP Home is not one of the allowable downgrades, even if I were to try
installing it from system recovery discs (the link provided is a bit unclear
on exactly how you downgrade using an OEM or Volume License copy that
doesn't come with full installation media, as most of them don't).. only XP
Pro. Hmm.. I wonder if it would work to upgrade the current XP Home
system to XP Pro; then if I could make system recovery/restoration discs for
this upgraded system, and use them to downgrade the Vista? Yikes.
But now I'm wondering what, exactly, is the difference between "downgrade
rights" and simply installing XP anew, and then reinstallilng Vista Business
when you do want to migrate? Is it that you can use a previously activated
OEM license, for instance, from another machine? (And would the previous XP
computer then be unusable?)
"John John (MVP)" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Yes, that is true, there are certain downgrade rights available, but will
> the OP be able to take his upgrade XP cd and stick it in the computer and
> have it see the Vista installation and actually install XP without
> supplying further previous proof of ownership of a qualifying product,
> will Vista qualify? I'm not sure how that would work with Vista already
> installed.
>
> John
>
> VanguardLH wrote:
>
>> "John John (MVP)" wrote in <news:(E-Mail Removed)>:
>>
>>
>>>No, Vista cannot be "downgraded" to Windows XP.
>>
>>
>> Not completely true. The following Microsoft document shows which
>> versions of Windows Vista (OEM) have downgrade rights.
>>
>> http://download.microsoft.com/downlo...rencesheet.pdf
>