As far as I know, "PlayReady 3.0" is a feature that has to be supported by your hardware... specifically the hardware that's playing 4k video for you.
As long as your 4k video is being decoded by a processor that supports it, there shouldn't be any further action required on your part.
Now, the Kabylake processor has hardware H.265 decoding, and supports PlayReady 3.0.... and supposedly is specifically listed as "compatible" with Netflix 4k.
The latest NVidia graphics card is also supposed to support PlayReady 3.0, but there seem to be issues or questions regarding its compatibility with Netflix 4k.
I wonder if, since you have a powerful graphics card, your computer has "decided" to allow the graphics card to do the H.265 decoding instead of the CPU....
If there are compatibility issues between Netflix 4k and your graphics card, then you may
HAVE to do your video decoding in the CPU to get it to work.
To get that to happen, you may have to "disable video acceleration" somewhere (to force the decoding to occur in the CPU rather than the more powerful GPU in the graphics card).
This might be a video setting in Windows (probably in the config utility for your graphics card), or a setting in Netflix, or in your BIOS, or may even require multiple settings in different places.
(I think I would Google around and see if you can find more details.... or try and contact Netflix directly since it seems to be their problem.)
Ok good to know. I'll try to post pictures of what I mean so that I can make sure I'm actually telling you the right thing.
Anybody know how to get Microsoft Playready 3.0 on windows 10?
I can't seem to make the musiland digital times card work with windows 10 64 bit. The installer does install. Then nothing happens. The drivers are not installed for the device. I tried the "update driver" and pointed it to the application for it to find no Drivers?! I went to the musiland asian website and only to find the link to their own drivers was broken. So I used the CD that came with it. 
