I can view many recorded TV shows from Media Center, but copy protected ones wont display on my HD TV via HDMI cable. The error message also shows up at same time on PC display. Tried a HDMI splitter - no help. Wondering if a HDMI to component cable (Radio SHack) would solve this apparent HDCP issue?
Did you make sure all your devices from one end to the other are HDCP compliant? You said you had a "display adapter", is it HDMI to HDMI or is there a converter in there? And what is the error message you said comes up? Did you contact the TV vendor or the PC/video card vendor?