Hey ciri75
I use myself a Hauppauge HDPVR for live capturing from video sources such as game consoles so i believe i have a few solutions to your problem.
First of all the website doesnt supply the correct drivers so either that will be supplied in the Windows Update utility or will not be required as it is plug and plug.
Try this.
Go to
This Link for AMCap, this is a useful video capture model which includes many codecs and video/sound formats so it should give you a good chance of having the right ones.
Next make sure the video source is connected to the device and open AMCap
The Video/Sound source should be automatically found and configured. If not go into the device drop down menu.
Let me know if this helps at all
-Ryan