Could you explain more, exactly what are you trying to do? You "bought a wonder card", "watch american tv" "burned to disk"...
Reading your posts I assume:
1- You bought a video capture, have a sort of TV cable subscription and connected it from your TV through to your new card to watch american tv on your computer. It's correct?
2- Or are you watching american TV after downloading from Internet?
If you are into "1", I recommend DO NOT go to register and delete nothing by yourself, unless you really know what are you doing. Just delete the aplication you don't want in 'control panel', 'add and remove software'.
If you are into "2", just delete your codecs and install codec pack like k-lite:
http://www.free-codecs.com/download/...Codec_Pack.htm