Hi Greg & Alain,
There are a number of things that can cause the kind of trouble you are reporting. Plus, in Alain's case, there are additional issues when attempting to play a copy of an HD blu-ray movie from a hard drive. First the general issues...
The place to start is with your PowerDVD 10 Ultra installation. Here are some points to consider. Any one of them can cause trouble, including unsupported disc errors. Sometimes the error messages are not accurate and do not convey the true cause of the problem.
1 - PowerDVD 10 requires current video drivers. It is strongly recommended that you remove your existing video drivers and install the latest versions before you install PowerDVD 10. Drivers that were okay with older versions of PowerDVD may not work with version 10. (Contact your computer or video card manufacturer for the latest driver.)
2 - Some overly aggressive security software can interfere with the PowerDVD 10 installation and you may NOT receive an error message during the installation process. You could check the logs of your security software to see if they intervened during the installation. If you suspect that this is a problem, the solution is to remove PowerDVD 10, disconnect your computer from all networks, including the internet and temporarily turn off all antivirus, antispyware, antimalware and firewall software. Then re-install PowerDVD 10. Remember to turn back on your security software afterward before you reconnect to any network including the internet.
3 - PowerDVD 10 is not compatible with some of the other HD media players. For example, Arcsoft's TotalMedia Theatre software (a competing media player) is known to cause trouble if PowerDVD 10 is also installed. This is fairly common. It is usually best to have just one media player installed for blu-ray playback---unless you know for certain that your particular combination of players will work together.
Next, we come to hardware issues:
4 - Blu-ray disc playback requires a secure system that supports HDCP from end to end. (You can sometimes get around this requirement with third-party programs like AnyDVD HD described below.)
5 - Blu-ray security is not static---it is updated from time to time and this means that newer discs may not play on older players. This is why blu-ray drives need to have their firmware periodically updated so they can support the latest security changes ("improvements"). (Contact your computer or blu-ray drive manufacturer for the latest firmware for your drive.)
Next, weird issues:
6 - I have one disc that PowerDVD 10 Ultra won't play on my system. It is the "District 9" blu-ray and it gives the "unsupported format" error message. The District 9 disc is a hybrid disc because it contains both the HD movie and a PS3 game. Many other PowerDVD 10 Ultra users are able to successfully play the Distric 9 blu-ray disc without problems but I couldn't get it to work on my computer. Perhaps it has to do with my operating system (I'm still using Windows XP MCE) or a myriad of other variables (no two PCs are the same). In the end, I discovered a solution: I installed SlySoft's AnyDVD HD to temporarily circumvent the blu-ray security. The District 9 disc plays fine while AnyDVD HD is running. But this is an additonal expense---a "lifetime" AnyDVD HD license will cost you about the same as PowerDVD 10 Ultra.
Hard drive playback issues:
7 - CyberLink is in business to sell its media player, PowerDVD 10 (in addition to other software). In order to do this without incurring the legal wrath of the movie industry, they have designed PowerDVD 10 Ultra to comply with their copy protection requirements. This means that PowerDVD 10 Ultra will try to detect if a copyrighted HD movie is being played from a source that is NOT a licensed blu-ray disc and disable playback if it is discovered. Older versions of PowerDVD Ultra reportedly take a more lenient stance regarding the media source drive but that was "yesterday" and things have gotten worse today. This is why you should try a program like PowerDVD 10 Ultra before you buy it. It might not do what you want. One solution may be to install AnyDVD HD to circumvent the blu-ray security (as described above). But CyberLink cannot support such actions and probably won't allow a discussion of it here. The best place to get more information would be at SlySoft's forum.
Finally, if you haven't already done so, submit a support request to CyberLink about your issue. The first thing they will ask is for you to download a program that will enable you to send them a list of every driver in your computer related to PowerDVD 10 so they can see if one of them needs to be updated.
Remember, forums like this are designed primarily for users to help users and they are voluntary. Always pursue support directly from CyberLink Tech Support as you first-line avenue for help.
Kind regards, David