Xbox One OS

Xbox One OS is a MinWin-derived firmware developed by Microsoft to run on the Xbox One and Xbox Series X/S consoles, which was released with the original Xbox One console on 22 November 2013. Versions before 2014 are based on the Windows 8 codebase, whereas later versions are based on the Windows 10 and Windows 11 codebases.

It includes a host OS that contains a heavily-modified version of the Hyper-V hypervisor. It also includes two partitons that are reserved to run different operating environments and applications. They both contain custom virtual machines that are reserved for different purposes. The Exclusive partition is reserved for running games and the Shared partition is reserved for running multiple apps which also includes the OS itself.