Hi Leon2006,
What is the patch version number that resolved this? Cyberlink's last two patches seem to have killed HD-DVD for me.
I have the same LG drive and the PowerDVD V7.3 that came with it. My HP PC also came with an HD-DVD drive and HP HD-DVD Play (also by Cyberlink) and the latest patches killed that as well, but I am able to install the original version and once again play HD-DVDs. It attempts to force the upgrade process, so I allowed it to upgrade again after I got it working, and it killed HD-DVD the second time, too, so I have confirmed that it is the Cyberlink patches that are breaking HD-DVD. I've re-installed the old version and I'm now forced to bypass the "update" dialog each time I use the HP HD-DVD Play software, but at least it keeps playing HD-DVD's.
Because I have the LG combo drive, I'm using PowerDVD 7.3 to play Blu-ray movies, and it is forcing the upgrade with no chance to bypass (and I need the upgrades to play the newer Blu movies, anyway.) This is breaking HD-DVD within PowerDVD, so if you can tell me the version of the patch level that works for you I will request it from Cyberlink, as it is annoying to have to keep switching to the old program to play HD-DVDs (and if I don't bypass the upgrade correctly, I have to re-install the second again! What an annoying program!!)
Thanks,
Blaine