How does Windows 10 Home compare to Windows 10 Pro and S mode? All support basic Windows 10 features, but advanced functions depend on the version and mode.

For example, S mode is faster and more energy-efficient because it runs far fewer types of programs than full Windows 10 does, and uses a less-sophisticated computer.

Microsoft head honcho Joe Belfiore confirmed today that Windows 10 S won't be a separate Windows version anymore and that Microsoft will ship an "S Mode" with Windows 10 starting 2019.