Xbox One OS build 8422

Xbox One OS build 8422 is a build of Xbox One OS. It was originally shared in the form of a development kit disk dump under the VHD format around October 2012, and is based on a heavily stripped-down version of the Windows Preinstallation Environment, leaving only the bare essentials required for launching Xbox One/Durango games such as minimal GDI+ and USER APIs.

It notably contains an early version of the Xbox dashboard (referred to as the Xbox Compositor), which is merely a simple list of launchable/installed applications complete with a small number of configurable settings, along with additional debug information detailing the console's specifics and current network information printed at the top right.

Findings
As described earlier in the article, the operating system is based on a heavily stripped-down version of the Windows Preinstallation Environment, and therefore only includes the necessary APIs required for games built for the Xbox One (then-codenamed Durango). Support for legacy Win32-based applications is almost entirely absent, with binaries commonly used by regular desktop applications being replaced with cut-down variants containing APIs found in regular PC games that additionally take advantage of DirectX or featureless stubs such as. Likewise, a unique disclosure warning with a similar premise to the NDA warning found in the watermarks of various Windows 8 builds can also be found within the aforementioned binary's respective MUI file, stating the following:

"Use of all files being copied and installed during this installation process are subject to the terms and conditions of the Durango Development Kit License Agreement between Microsoft Corporation or its affiliate, and you or your employer. If you or your employer does not have a valid Durango Development Kit License Agreement, you are not authorized to use these files."

The build comes with a driver for an AMD Radeon HD 6300 engineering sample and contains several internal development tools for Xbox One applications. By default, the preinstalled image contains two applications used for testing the Kinect's hardware. On startup, multiple services that are required for full development kit functionality (such as an FTP server and a Telnet client) are launched alongside the compositor and the standard Windows command line interface, which can be switched to with the Alt hotkey.

The build is best utilized with an Xbox 360 controller, although it is possible to fake controller input by pressing the F12 key and using the keyboard to navigate through the interface.

Bugs
The Dashboard found within the original leak's virtual hard disk (and the VHD provided within its recovery media) does not function by default. A copy of the build's recovery VHD which contains a fixed Dashboard was published on July 2021.