Windows 7 Product Key Upgrade link is missing

I  purchased a gateway with Windows home professional on it.  I select windows upgrade and selected Professioanl upgrade.  I downloaded it , updated the key. Its been over 30 days now and windows is coming back saying it is not  a legitimate upgrade key..  The update product key  link under systems does not appear.  Does any one have any suggestion on how to fix this.
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Try cscript slmgr.vbs -ik [key]

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Longstreet_1861Author Commented:
This was helpful for it pointed me in the right direction.
Longstreet_1861Author Commented:
this was helpfull
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