I am a student, thus I had a genuine key for Windows 8.1 Pro N, which I used quite a long time without a problem. But after updating to Windows 10, it says, that Windows is not activated. How to proceed now?
I already tried to use my old key for W8.1 Pro N but that, obviously, did not work.
I do not want that comment in the lower right corner which indicates that Windows is not activated. I am definitely not going to buy a key for something which was praised as a 'free update'.
Thanks for any advice.