This is what happens when you update youer windows. Sometimes microsoft can be so mean. It is like they want you to buy windows all over again which I am sure that you do not want to do because you would not be complaining if you did. I have a soultion but you may not like it. Let me tell you what happened in my case. It was not the operating system but my microsoft office that lost its license. I had just got a new hp 15 laptop and i kind of messed up with the audio driver and installed one that was not supported. My computer refused to start. It would say problem detected, try to fix it then start all over again. I had no choice but to reinstall the operatinfg system which meant that all of the prgrams that were not part of the opearating system were eleted including microsoft office. I was not ready to pay for microsoft office all over again as windows wanted so ihad to do something. I downloaed microsoft office 2016 from a certain website and it had a program in in the zip that I used to activate it. The program also activates windows. It is called KMSactivator.exe. Use it to permanately activate your windows.