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I installed PowerDVD 7.3 with the 2911 patch update but when I tried to play Casino Royale blu ray, it basically plays the featurets and also trailers but when I try to play the movie, it doesn't work - any ideas?
The T7200 is a 2GHz processor and should work fine.
Processors do not have driver updates so that cannot be the issue.

As Matt says it's not the CPU.
It's the graphics card; lets say you went to work in Japan and they give you the instructions in Japanese - you've not learnt any of the language yet, so you can't do you job the way they want you to, this is like the driver for the graphic card, it's not sure what to do with the information it's given, so it just sits there and the CPU usage goes up to 100% as the instructions pile up.