HDCP error suddenly on any display
Hello community,
totday I tried to watch a HD TV-episode bought from the iTunes Store on my Thunderbolt 24" LED Cinema Display, but all I got was an HDCP error. Also on the built-in screen of my MacBook Pro (2011) - same error! This is so most frustrating! Tried restarting, SMC reset, NVRAM reset, deauthorize, authorize - no effect at all, same HDCP error. Clueless now...
I can't understand this, I never had any problem with HD-rentals or purchases at all. This worked so many times before, the last time was around June '14. What did change in the meantime? What am I missing? Is there a solution?
Thanks in advance for your help,
Werner
MBP (early 2011), 24" LED Cinema Display, OS X 10.9.4, iTunes 11.3.1
MacBook Pro (15-inch Early 2011), OS X Mavericks (10.9.4)