How to change Visual Studio 2012,2013 or 2015 License Key?

Question

I have a Copy of Visual Studio 2012 Pro on my machine with a Serial key that i\'m no longer suppose to use because i have to use another one. My problem is i keep Uninstalli

Answer 1

For those who will need to remove product key from Visual Studio 2015:

1. remove registry key HKCR\Licenses\4D8CFBCB-2F6A-4AD2-BABF-10E28F6F2C8F
2. repair Visual Studio installation

That's it, now you can change the product key if necessary.