I wonder if it might be something to do with Java, now you mention that Laurent; that's the ONLY thing I've updated or installed between when it worked and now.
I've logged a technical support ticket about it, will post here any info received.
Also worth noting I checked my virus scanner (the second message suggests doing so) and there's been no trace of any malware/virus etc, nor has anything appeared in the logs relating to Cyberlink or PowerDVD. I made all relevant folders exempt from scanner activity etc, and even totally closed out of it (something I regularly do when viewing BDs as having it running makes them slightly juddery after a while, and performance returns instantly once I close it), and none of that made any difference.
Also worth noting I tried a DVD and whilst it played, I tried to skip the studio logo and it dumped me back to the home screen. Played again, got the resume prompt with all the movies chapters along the bottom (which looked corrupt; green bars across the top of them), and clicked a chapter. This started playing fine, but when I tried to slide the progress slider along, I got dumped back to the home screen again.
EDIT: I tell a lie! The last time I watched a BD was Jan 31 (Letterboxd's diary helps me keep track ha). Since then I had a raft of Windows Updates. Some of these were MS-Office related, but the others all seems to be Windows 7 Security issue patches.
Are you guys running Win 7, and/or have you done Windows Updates between everything working and when the problem started?
All that being said, even if this was caused by a Windows Update, you'd think all the uninstalling and registry cleaning I did before reinstalling would fix the problem, unless something was fundamentally altered.
This message was edited 2 times. Last update was at Feb 21. 2013 18:38