I have built a new HTPC and I can only play back HD-DVD movies from disk if I have AnyDVD-HD turned on. My setup: - E4300 - Visiontech ATI Radeon X1650 PRO with HDMI and HDCP - XP MCE - XBOX360 drive with Toshiba UDF2.5 driver - PowerDVD 7.3 - AnyDVD-HD - ATI Catalyst 7.3 from 3/28/07 from ATI's site. - JVC 40" LCD with HDMI/HDCP If I have AnyDVD turned off I get an error message about improper graphics driver and try to run the default driver. If I have AnyDVD turned on I can play the movie just fine. I only have King Kong for now and it looks awesome once it's playing. My question is what is AnyDVD-HD doing that causes WinDVD to work fine? What am I missing from being able to play back original movies from factory disks with my setup short of using WinDVD-HD? What is the magic ingredient that AnyDVD brings to the table? Is my Video card not HDCP compatible? (Visiontek says specifically on their site that it includes the HDCP key). Is my LCD not HDCP compatible? The specs only said HDMI/HDCP compatible. Why am I getting graphics driver errors? What the heck is a default driver? I have purchased AnyDVD-HD already to be able to store DVDs on my network drive and stream them to my computers, I just want to know what part of the equation I am missing that does not allow me to play back legally owned movies from their disks without resorting to removing some kind of protection.