If you've been using multiple VR headsets on your PC, keep in mind that the active OpenXR runtime may be changed by another vendor's system software. The Microsoft Store then keeps the runtime up to date. That's it! The Windows Mixed Reality OpenXR runtime is installed and made active automatically for all Windows Mixed Reality users. Set up a Windows Mixed Reality headset or enable the Windows Mixed Reality simulator.If you're on an earlier version of Windows 10, you can upgrade by using the Windows 10 Update Assistant. Earlier versions of Windows 10 should still work with OpenXR but may not have ideal performance or quality. Be sure you're running at least the Windows 10 October 2020 Update (20H2), which is the minimum supported OS release for Windows Mixed Reality end users to run OpenXR applications.To start developing OpenXR applications for immersive Windows Mixed Reality headsets: Getting started with OpenXR for Windows Mixed Reality headsets

If you're using the emulator, the emulator image will reset each time you start it, and so your best bet is to just make sure that you have the latest version of the HoloLens 2 emulator image.

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