Tv Tuner Problems, HELP!

[gib786]

Installed a "twinhand DTV ter" freeview and analogue tuner into my pc, plugged in a amplified ariel and set it all up, but when i go to load a channel up the video feed lags like anything, cant work out how to sort it
any ideas?

thanks!

 

[gib786]

all the hardware stuff is set up properly, still getting the problem