I'm in a difficult situation. I'm going to be demonstrating VR tomorrow to a group of people and for some reason, when I launch my Vive/Viveport now, its' as if STEAM and VivePort are fighting for control of the headset. I see a ghosted Vive port window (with Vive Video on display) behind the Steam display. And, it's impossible to move my head around as it seems to only display about ever tenth frame or so...sometimes the HMD display just locks up and no movement occurs at all- just a frozen image.
It was working flawlessly until today. Any ideas? Was there an automatic update that has killed something here?