One screen I barely had time to read, it was to allow Microsoft (I guess) to be privy to everything I do on the laptop (I think).
You barely had time to read?
hmmm
Any way, you got 3 options. They all need you to write down your activatation code AND THE product ID
1. Revoke permissions, like you said. If you know how to do that, great! Fastest, but not very certain.
2. You can try to reset Windows, this is an option during boot up. Costs more time, but it is more certain.
2. Reinstall Windows. You would need to download installation media from the microsof site, put it on an usb and reinstall it. Takes the most time, but you're 100% certain no funny business occurs.