Some people have had to uninstall powerdvd completely and then reinstall it. Have you tried that?I m haviing a problem playing any blu-ray at all right now. They use to all work, but now when I put one in it says that it has to update a critical component, and when it does so, it refuses to play.It does this with all my blu-rays, even the ones that used to work and do not have the latest encryption. And yes I am using the latest powerdvd and anydvd hd software.
Here's the instructions for completely removing PowerDVD from XP: www.humpa.com/powerdvd
I assume the 90mb download you get from the cyberlink index.jsp page will do a full install (we're not supposed to link to that, I think? - even though it isn't the download) - I haven't actually tried it yet. I was busy this weekend so I never go around to it.