Just built a Media Center System using an Elonex barebones, 250 gb HDD, 1gb mem, Nova 500T dual digital tuner, P4 650 CPU, Asus 600se PCI express graphics, WinXP MCE 2005 OS. All hardware is compatable. The problem is when i launch Live TV the picture stutters frame by frame and i have no audio. When i record, the playback is normal but there is no audio. If i launch the win TV application everything is working including audio the problem only occurs in Media Center. I have installed all codecs and i have tried another graphics card with the same results. All other aspects of MCE are fully fuctional and the Digital signal is strong. Ideas anyone?