Weird! I dont have that problem. I play with reflections off, I can run with them on, just have them off so as not to frame loss around ports and extreme traffic. If I am correct, Nvidia card settings are port specific with the rift(not sure if other brands work like that or not)? Meaning set it up THEN plug HDMI of rift into the slot you just set up using monitor? So my Nvidia settings shouldnt effect the mirror image on desk top. Has to be a setting some where?