not genuine version of Win 7

A computer guy installed Win 7 build 7600 on my laptop. It had Vista from installed when I bought it. Now I am receiving notification that it is not genuine. What can I do. I paid him money for the installation.
Damaco

You need the product key.

Topic moved.

How do I obtain a product key?

Hello,

Go back to him and make sure he installed a genuine version of Windows and ensure that he activates the genuine version it for you.

Thanks for your help, I am no luck with the guy, he refuses to answer his phone, however I realize that I would have purchase the genuine product

Maybe you can try going back to his shop or something. If he refuses to install a genuine version you could report him to the authorities or something for scamming you.