Running Windows 10 64 bit. This PC is a meeting room and so is accessed by lots of users. When logging in, Windows detects it's outputting to a TV (as opposed to monitor) and so automatically sets the screen display size to 150%. RIGHT CLICK DESKTOP - DISPLAY SETTINGS - CUSTOMIZE YOUR DISPLAY confirms this. This causes the 3cx client to not display. I can see it's running, it just refuses to display. The curious thing is I can alter the slider to 100% and then back to 150% and it then displays. It's as though the client can't handle this initial display of 150%. I suspect this is a bug in the 3cx client?