If Windows Mixed Reality is not functioning, isn't downloading, or there's no sound or display , this article can help you resolve Mixed Reality problems & issues.
PC users who want to install or configure Windows Mixed Reality on their device need to simply plug the HDMI cable from the headset to the HDMI port of your computer's graphics card. Plug the USB 3.0 cable from the headset to your computer's USB 3.0 Port and the Windows Mixed Reality app will start automatically.
