I had activating issues too, but the keep trying tip helped (i don't think you have to click like mad, just keep trying, maybe the issue is now gone i don't know)
I used my USB Stick to upgrade (created with media creation tool), and runned the setup.exe while running win7 (on that way i only have to download it twice for my seven pc's (home and pro))(i did not reserve anywhere)(and i have boot medium for clean install as well!).
What negatively suprised me...two control panels, why MS?
What positively suprised me: updates can also with the home edition be shared in the local network.
Only thing that don't work is logitech gaming software 5.10 for my driving force gt...but I hope logitech will fix the setup of that, it is just the OS check that fails.
Unfortunately, the current version of logitech gaming software (which works on win10) does not include the wheel drivers...