It appears you need to upgrade the DVD software too.
But this is something you don't want to do. And you may have to wait for yet another update by Cyberlink if the update failed.
If you call it in, you'll get pretty much the same answer. For my machine, I uninstalled PowerDVD, reinstalled it and PowerDVD works again. WMP 10 is not used for DVD playback for now.
I have just reformatted my sony desktop & installed sp2,running xp home. installed windows media player 10 & now it won't play dvd's. I get an error message about digital copy right protection.It says I need a decoder. had no problem playing dvd's in mediaplayer 9. I also have cyberlink power dvd preinstalled & now I can't play dvd's on that either-get error message.Had no problem before. Is ther a fix? w/o installing a new dvd program? Also, if I uninstall mediaplayer 10, will it revert back to mediaplayer 9? this is driving me nuts!! I have tried the update for cyberlink power dvd, but to no avail. Please help!