as far as I concern, I'm not the only one having problems with HDCP-output since upgrading Windows 10.
Graphicsunit: APU HD8670D
OS: Windows 10 64Bit
BD-SW: Cyberlink PowerDVD 15 Ultra
Driver: Latest Crimson-Software (also tried the Windows 10 CCC - same issue)
Same configuration under Windows 7 was absolutely fluent. No problems at all. Since Windows 10 Cyberlink BDAdvisor says everything ist fine except graphicsunit.
So I'm unable to play my Bluraydiscs anymore.
I reinstalled Windows as "clean" installation. Then installed PowerDVD. Got the latest updates, drivers, patches etc. - still the same problem.
I also reported the problem to Cyberlink and to Microsoft. But I think it's more a driver-issue.
There are lots of posts all over the web, where this is discussed, but there seems to be no practicable solution...