I can't use my Windows product key 7

I have a windows 7 key to dreamspark (my University a premium) product I downloaded windows 7 installed and now I can't turn on it says "the product key you entered cannot be used to activate windows on this computer" what can I do about it?

Have you tried to restart by phone?

How to activate Windows 7 manually (activate by phone)
 
1) click Start and in the search for box type: slui.exe 4
 
(2) press the ENTER"" key.
 
(3) select your "country" in the list.
 
(4) choose the option "activate phone".
 
(5) stay on the phone (do not select/press all options) and wait for a person to help you with the activation.
 
(6) explain your problem clearly to the support person.
 
http://support.Microsoft.com/kb/950929/en-us

Tags: Windows

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