the key of Win 7 does not have to reinstall them.

I have a Macintosh, and I run windows at a decent speed in virtual box. I received my copy of my father, who bought it to run in a virtual machine on your mac. He had installed once and then deleted the disk image. This is the second time I used this product key on a virtual machine, 3rd overall time. All the old copies have been deleted. I want to be able to use my copy of windows 7, but it says my key is invalid, probably due to the installation of the previous system. How can I prove to Microsoft that this is my only copy of Windows 7 installed, so I can come back to use it for my windows applications. I can't call the customer service, because they charge $ 60 for a call without the PID, which I don't have.

You will need to use the phone activation:

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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