Whenever Webex is started the "Windows Driver Foundation User-mode Driver Framework Host" process opens up several times and causes CPU to max out at 100% causing the Machine to be unusable. If Webex is stopped all returns to normal. Has anyone manag...

We are using external microphones via a Crestron control unit. It appears the mics are being fed to the Room Kit Plus via the HDMI ARC return channel. How do I disable the HDMI ARC channel and enable the built in microphone array?