Sorry for possibly a stupid question, but what’s the point of activating Windows?
I never seriously used Windows, but I have a Windows 7 VM that’s not activated, and it works. Just the wallpaper is black. Also most of our school computers don’t have activated Windows, yet it seems to work fine, there’s just the watermark. And on some it shows the “You may be the victim of…” message. Same seems to be the case for Office 2016 installed on those. Other than the “non-genuine” message, it works.