There is also a strange page in settings called Device Usage seemingly to sign up for additional targeted advertising. Windows 10 drivers all seemed to work, and applications detect the build as Windows 10 for compatability. The built in themes are different, and quite nice and dark mode works as well as the most recent versions of Windows 10. The build activated properly with a Windows 8.1 Volume License MAK key, and we were able to look through the themes.
