Installed Windows 7 twice on the same Mac.

I recently bought a Macbook Pro 15 "retina and installed Windows 7 on the merger." I am not satisfied with the merger and want to switch to Bootcamp, which requires a new installation of Windows 7. Can I use the same product key or what I have to buy windows 7 again?

Yes, you can, but you may need to reactivate 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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