Does it shut down or refuse to play?
Get an an codec just to make sure it isnt the Hardware's Problem.
It locks up, On every Blue-Ray disc, an won't do nothing till I use task manager, to shut it down. It will play DVD's just great.
I went so far as to buy a different BR player, with the same effects. I also installed a different proggy for playing, but it also failed. Could this possibly be, That my video card isn't enough?