I'm running Windows 10 on a 2012 Mac Mini using Apple Boot Camp. Video is coming from the Mac via Thunderbolt to a 1440p Apple Thunderbolt Display. Audio is coming from the Mac via HDMI to a Yamaha A/V receiver. The problem with this arrangement is that Windows thinks there's a secondary display, when in fact the HDMI is only being used for audio not video. Is there a way to shunt the secondary display in Windows Intel Graphics properties so that HDMI audio gets through but the mouse pointer and windows don't get lost on this phantom display?