The only combo that works for me is Coreavc for H264 and Purevideo for audio. I can't never get FFshow or PDVD codec to work on my machine. Coreavc costs $ but can play 90% of H264 channel without problem. Occasionally on fast scene it will stutter a bit. I can use PDVD on MT beta 10, and it plays p...

Can you view the picture in DD without problems? DD can't be used with PDVD H264 codec as the video and audio are out of sync. I have tried a lot of codec and the only combination works for me is Coreavc for H264, and Nvidia PureVideo for audio.