New
#11
Um... No. This is something you borrowed from Windows 8 book. In Windows 8 it was not a big deal because administrative functions were carried out by the "classic" windows applications and apples.
In Windows 10 Microsoft decided to redirect many administrative functions from "classic" windows applications and applets to new "universal" ones. They also decided to push Edge as the primary browser for Windows 10. In order to do that they had to allow running universal apps under built-in Administrator. And that is exactly what they did. The ability to run universal apps under such accounts as built-in Administrator is one of the fundamental differences of Windows 10 from Windows 8.
That applies to all universal apps. In the original Windows 10 you can run absolutely anything under the built-in Administrator. The problem described above began only after 1511 update and only in clean installs.
I don't know why have never been able to run them. Everybody was able to run universal apps under the built-in Administrator after the original release of Windows 10. This was one of the "big things" about Windows 10. Moreover, everyone is still able to do it after the upgrade to 1511, as long as it was really an upgrade.
The block is there in clean installs only. Why it is so - I don't know. Is Microsoft now trying to pedal back to Windows-8-style behavior?