Just a thought:
Perhaps its the reader itself and not so much power DVD thats the issue under 7?
It may be possible the Bluray reader itself needs a firmware update to work correctly under 7.
Im unsure about other brands, but my LG has firmware update software that came with it, and updates itself periodically. And Ive had no isseues
Powerdvd mmmm i had problems with that program a long time ago deleted it not saying its not good but i found using my Nero 9 Showtime to play bluray was flawless picture and anyone using a HD graphics card its beautiful :)
Had a similar problem. When I tried to play blu ray on my hd tv monitor, i got error message that it was not compatible in the current display mode. Spent 3 hours on the phone with hp tech support and no help. U can not play blu ray when connected to 2 displays. In windows 7 hit the f key and the f4 key at the same time and u will get an icon window. To play on your hd tv select "projector" and the tv will be your only monitor communicating via the hdmi cord. When finished viewing, eject the DVD and repeat the f & f4 key. This time select the clone icon and u can now view your computer on either display. Hopefully, this will help those who have an hd tv connected to their computer. I really surprized that 3 hours with hp tech support didn't know this. Good luch.
PowerDVD 9 Ultra works fine for me too. And as already mentioned, have a look for updated firmware for your drive too.
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