vr preview mode does not work well

In Unreal Engine editor,vr preview mode does not work very well.
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What headset are you using? If you launch the HTV Vive “SteamVR” or Oculus “Home” before launching Unreal Editor, you shouldn’t have a problem.

Also make sure you run the project as Administrator.

It is so annoying but unfortunately I think this is the only way to make it work. I have a shortcut to the engine on my desktop to UE4Editor.exe “C:\Program Files\Epic Games\4.13\Engine\Binaries\Win64\UE4Editor.exe”, I right click the shortcut and select Run As Administrator, and project I was working on last opens up.

You can also run the Epic Games Launcher as administrator and any project you open up with it will also run as administrator.