So my Windows 10 recently started asking for activation, presumably over an update? But I didn't upgrade I did clean install of Windows 10 Education. Usually you can change the product key via
This PC >> Properties, but this was gone for me.
It says Cannot reach Microsoft Activation Center, please connect to internet and there is an Option to Activate Now. This did not work either, but is worth trying.
In the end I ran
run >> slui 3
This brings up the Change Product Key Windows 10 Prompt.