I just looked at the DTV2000 H on Leadtek's site and a Win 7 driver is not listed.
However, I then did a search on drivers - "DTV2000 H" and Win 7 drivers did come up:
ver 18.104.22.16800 dated 2009/10/23.
I downloaded the file and ran the installer. It said it was installing the drivers and then asked for a reboot. After reboot Device Mgr stilll has the old drivers listed. I then ran the same installer as Administrator with same result.
Turns out Leadtek only updated the driver for the DTV2000 H Plus, but not the DTV 2000 H.
How hopeless is that?