Hi Ottoman,

If you're typing in your KEY correctly you should contact Microsoft support at:
(800) 537-8324 or examine the other support options for Halo at this UR:
http://support.microsoft.com/oas/def...510&gprid=1953

--
Cheers, Windows XP MVP Shell / User
Jimmy S. http://mvp.support.microsoft.com

Visit my MSN Zone.com and Gaming Help Site: http://mvps.org/nibblesnbits
MS Games Help and Support Center: http://support.microsoft.com/?pr=gms
My advice is donated "AS IS" without warranty; nor do I confer any rights.
__________________________________________________ _______

"ottoman673" <ottoman673@discussions.microsoft.com> wrote in message news:29951823-6BEC-485D-918A-6114AFAC41A4@microsoft.com...
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| Hello.
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| At one time, i bought halo, installed it, no problem.
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| Then i uninstalled it.
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| When i came back to it, the product key was invalid
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| Help!