Hi,
I also had this problem, from the sounds of it i don't think your looking at the right place.
Follow these instructions:
Go to Start, Control Panel, System, Hardware Tab, Device Manager, Click on the plus where it says Sound, Video and game controllers, Video Codecs (Right Click and Properties), Properties Tab and view the list,
If HUFFYUV is there, just click and press the remove button.
Hope this helps
Paul