Windows Mixed Reality officialy dead – next Windows update removes it from your system
According to this post on r/virtualreality:
Build 26052 update notes: Plugging in to use a Windows Mixed Reality headset will not work starting with this build. Windows Mixed Reality is no longer available to users as Windows Mixed Reality has been announced as deprecated. This includes the Mixed Reality Portal app, and Windows Mixed Reality for SteamVR and Steam VR Beta. Existing Windows Mixed Reality devices will continue to work with Steam through November 2026, if users remain on their current released version of Windows 11 (version 23H2) and do not upgrade to this year’s annual feature update for Windows 11 (version 24H2). This deprecation does not impact HoloLens.
You have to disable Windows updates to keep it working.
