I am attempting to upgrade the video card in my PC and am unable to get it to work with my TV tuner card. I am running Windows XP Media Center (not the 2005 version). Someone suggested upgrading to Media Center 2005, but I have my doubts that this is the solution. My PC will not even boot with the TV card installed. My new video card is an Raedon 9600XT 256MB and has VIVO, but does not have a tuner (so I'm not trying to insall two TV tuners). My guess is that the video in on each card is what's causing the problem. Please help!