Windows 8.1 build 9600.17415

Windows 8.1 build 9600.17415 is the official RTM build of Windows 8.1 Update 3 released on 19 November 2014. It was again planned that a Start Menu would be implemented and support for windowed Metro apps would be added, but only the Start Menu was implemented for ARM devices. This update was released for ARM devices on 1 September 2015.