oldMohawk, this suddenly happened on my last Webcam, that is why I bought this one, obviously not a Camera fault !! like you said I can use print screen, which I am doing. I tried 'Device Manager' but it did not show Hue device in the drop down menu. I will continue to use 'print screen' although it shows 2 horizontal and vertical lines from camera image, also cannot use video facility but have no need of that. I have been told one of windows 10 updates may have caused the problem.
Curly, thanks for that info, will try with zero's. Am convinced it's a PC problem and not the Web camera. Eric