Never had a problem now I got a bunch. I have a VT5 procard that I have rebuilt the computer. Windows 7, It will boot to open up vt5 but will not show any output on program, shows output to preview, plus no audio......Have not even tried to put the sx-8 on it yet. I have re installed 7 times and about to just give up on this one. Took out card and installed older card and basically did the same thing.