Hi,
To start with, and OEM license is not transferable. It is only valid for the
hardware it is first activated on. In the case of a preinstalled OEM
version, this means that the license to use Vista is permanently tied to the
computer it comes with.
So, to your situation:
a) You cannot use the OEM Home Premium on a different machine than it came
with.
b) You can upgrade the Home Premium to Ultimate using a retail full version
or upgrade and it should preserve user accounts, data, programs, and
settings.
c) For the XP system, you'll need a separate upgrade license.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
http://mvp.support.microsoft.com/
Windows help -
www.rickrogers.org
My thoughts
http://rick-mvp.blogspot.com
"mor10" <mor10@xxxxxx> wrote in message
news:5292D106-6034-4339-98D2-8072706CB059@xxxxxx
Quote:
>I have a computer that runs Home Premium and another one that runs XP. The
> Home Premium came as a OEM disc with the new system. Now I want to upgrade
> the Home Premium computer to Vista Ultimate and move the Home Premium to
> the
> XP computer. I have a new (non OEM) version of Vista Ultimate on a
> separate
> disc.
>
> The Question:
>
> How do I update the Home Premium computer to Ultimate without losing
> what's
> already on it? And after doing so, can I install the Home Premium package
> on
> another computer or do I have to do something to move the license to the
> other computer like you do with Adobe software?
>
> I have two licenses - just need to swap them without losing all my data
> and
> software.
>
> thanks