With the release of Windows 10, the April 2018 Update, “Windows 10 S” becomes a mode of Windows 10 (called “S mode”) that is available in more editions of Windows (not just Windows 10 Pro).
You’ll be able to buy new PCs with either Windows 10 Home in S mode or Windows 10 Pro in S mode preinstalled.
If you have an existing Windows 10 S device, when you install the April 2018 Update, the device will become a Windows 10 Pro in S mode device.
You can switch out of S mode easily at any time through the Microsoft Store within Windows. There is no charge for switching the mode. The switch is one-way; if you make the switch, you won't be able to go back to S mode. See below for important additional limitations when switching out of S mode on devices that use the Qualcomm Snapdragon processor.
To learn more or switch out of S mode, go to the Microsoft Store within Windows and search for “switch out of S mode”.
Switching out of S mode is one-way. If you make the switch, you won't be able to go back to S mode.