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I too had the message pop up: "There is a a disc with an unsupported format in drive B:"
I followed all the above tips successfully, but nothing worked. I use Daemon Tools lite to mount iso image files of Blu Ray movies. It was in the Daemon Tools settings I found the answer that fixed the problem.
Click the "preferences" icon.
Then, click the "Advanced" tab.
Check the box for "Advanced Emulation"
This will install the feature and a reboot of your computer will be necessary after install.
This fixed the issue of playing Blu Ray iso files in Cyberlink DVD10 Ultra
Hope this helps others, and keep in mind, I followed all the above tips too.