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Vista Home Premium to XP Professional

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    Hello

    I have XP as an OEM on an old not-in-use PC and I have purchased an XP Professional Upgrade.

    I now have Vista Home Premium but would like to install XP Professional on my Vista PC.

    Can I use my OEM XP without that product key but the Professional key to install it? If so, how?

    Thursday, December 15, 2011 3:22 PM
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    "John Ricades" wrote in message news:1f3e22aa-a717-4a0a-b19c-902ede545048...

    Hello

    I have XP as an OEM on an old not-in-use PC and I have purchased an XP Professional Upgrade.

    I now have Vista Home Premium but would like to install XP Professional on my Vista PC.

    Can I use my OEM XP without that product key but the Professional key to install it? If so, how?

     
    No – Upgrades can only be used to upgrade an OS from an earlier version – not to downgrade from a later version.
    OEM licenses are ONLY valid on the machine on which they are originally installed.
     
    Noel Paton | Nil Carborundum Illegitemi | CrashFixPC | The Three-toed Sloth
    • Marked as answer by Darin Smith MS Monday, December 19, 2011 10:08 PM
    Thursday, December 15, 2011 10:27 PM
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