This happened to me, but cant see what all the fuss is about....
I came in to work this morning and got a message saying 'Windows needs to be activated' - no the computer didn't blow up, no the sky didn't fall on my head, no I didn't lose any functionality it still behaved like Windows 10 Pro - just a watermark saying I needed to activate Windows. I hit 'Troubleshoot' and the watermark was gone and a message saying Windows was activated. Hardly a reason to throw out Windows and spend the next 2 weeks installing Linux, tweaking the packages, services, window managers and hunting for equivalent apps that barely cover half the functionality of what I need to get work done in Windows.