The GDK and GDKX installers will normally install the latest version of the Microsoft Gaming Services, but in some cases this may fail, resulting in the Gaming Services not being present on your device.
When applying the workaround, please ensure that the sandbox for the device is set to RETAIL (xblpcsandbox.exe RETAIL) and that a retail Microsoft Account is signed in on both the Xbox app and the Microsoft Store app, otherwise the Gaming Services install may not be queued.
Known Issue (Workaround)
Tools | KB5004327: Error 0x80073D26 or 0x8007139F occurs when you install or start Gaming Services on a Windows 10 device
Found In: June 2021 GDK Update 1
The GDK and GDKX installers will normally install the latest version of the Microsoft Gaming Services, but in some cases this may fail, resulting in the Gaming Services not being present on your device.
This will result in an “Ensure GamingServices is up to date” error when trying to launch or debug a Game Core PC game or dependent app, or other errors related to this being missing. This is a known bug in recent versions of Windows that has a fix and workaround described in the following article: https://support.microsoft.com/en-us/topic/kb5004327-error-0x80073d26-or-0x8007139f-occurs-when-you-install-or-start-gaming-services-on-a-windows-10-device-a0a281bd-9b0d-4aa0-8c10-56f1bf9953af
When applying the workaround, please ensure that the sandbox for the device is set to RETAIL (xblpcsandbox.exe RETAIL) and that a retail Microsoft Account is signed in on both the Xbox app and the Microsoft Store app, otherwise the Gaming Services install may not be queued.