Windows RT 8.1 Refresh Pack 1

Windows RT 8.1 Refresh Pack 1 is a major update to Windows RT 8.1. It was released in February 11, 2017.

Features new to Windows RT 8.1 Refresh Pack 1

 * The new Start menu, similar to the one seen in Windows 10 Anniversary Update and above, rather than the one seen in early Windows 10 builds which is also used in Windows RT 8.1 Update 3.
 * The ability to install non-Store apps thanks to an emulation layer.
 * You can now switch between the Start menu and Start screen without signing out.