There are much easier solutions than that. I've not tried the sibling's idea, but just not connecting it to wifi, pressing shift+f10 and running "oobe\BypassNRO" is enough. It's still ridiculous and shameful behaviour from Microsoft, but disabling secureboot isn't necessary.
That works for the initial logon attempt, but after that the computer was locked in “S mode” where it doesnt allow you to install anything. In order to get chrome running we had to do the above.
