Sounds like you're going to have to call their activation line and speak to a
support agent. I did and within minutes everything was fixed. You sound be
able to find the number on the MS website.

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Hope this helps,
Daniel P
> I havce a legit CD; but when I enter the key on the case it says "Invalid"
> I've looked around the MS support sites but couldn't an answer. This version
> was successfully installed on an old Toshiba. The one that doesnt work is a
> Dell.
> Thanks for any help.