The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
Anyone else having trouble with their HMDs today?
I am running 16299.15 and all had been working well until I plugged in my HP HMD today. It appears that Windows update downloaded a new driver today, version 10.0.16299.1012.
Windows no longer recognizes my HMD. I now get the "HMD is not found error - Code 43" error detailed on the Headset support page. https://developer.microsoft.com/en-us/windows/mixed-reality/immersive_headset_support