I am having an issue with my license key for windows 7 pro. I bought this key in january 2019 but today windows has come up with a message saying that this is not a genuine copy of windows and when I tried to re-enter the key I get a message saying that
this key has been blocked by Microsoft. Can you please help?
If the product key is blocked by Microsoft, then it is no longer a valid key as it likely originated from a not-for-resale MSDN Subscription. You will need to purchase a genuine edition of Microsoft Windows and perform a "clean install".