I was playing Blu Ray disks fine on Power DVD 7.3. Now I installed Windows Vista Service Pack 2 and tried to play a Blu Ray about a week later. At first I had sound but it was choppy and unwatchable. Now, I reinstalled my video and audio drivers, and theres no sound and the DVD freezes after about 5 seconds. The computer doesn't crash, just the picture in Power DVD freezes. I have all green lights in the BD Advisor and everything else works fine. Any advice besides screw Vista haha?