UPDATED!!! For unknown reasons, the DP->HDMI 2.0 Adapter no longer allows me to play a Blu-Ray movie to the 4K HDTV! I've eliminated the adapter, and went with a straight HDMI->HDMI connection and there was no problem playing the movie. Original Report below..... Not only a month ago I was watching Blu-Ray movies without any problem on the current set up. But, now, after installing Windows 10 clean, AND, after updating all the appropriate software, I'm suddenly getting failures on these two items: Errors state.... HDTV is not HDCP compliant, and AMD GPU is not HDCP compliant. I have the latest 16.1 Hotfix drivers installed, and I'm using a DP->HDMI 2.0 adapter. The only two things that have actually changed are: Windows is newly-installed, and AMD drivers are Hotfix drivers....not officially certified. This is the report.... EDIT: The Blu-Ray movie plays just fine on this system IF I choose to play it on my 24-inch Viewsonic monitor. Either the ADAPTER/Cable is the culprit, OR, perhaps the HDMI INPUT on the TV is the wrong one to be connected to. I'll be checking that out next.