I am trying to get REW set up on my vista laptop. I tried my older Sound Blaster USB card and couldn't get a smooth response. When I plugged the output from the soundcard into an AVR, I noticed a lot of 'pop's and crackles as the sweeps played. Thinking I must have a bad card, I went and got a Behringer UCA202 as has been reported to work with Vista. I have not been able to plug this one into an AVR yet, but so far the measurements look the same as the sound blaster. I have tried changed the levels and making sure that every other audio control on my laptop is disabled. Same thing. I can adjust levels but my measurements always have these 'pop' in them. I have tried another USB port and the same issue. Java is up to date at version 6-10.