Dazzle works(?) on Vista ... make sure you download their latest Dazzle driver for Vista

however ....

forget Dazzle! ... i have Studio 10.8, Studio Plus 10.8 and Studio Plus 11.1.2 and Dazzle DVC150 and Dazzle DVC170 ... they are not compatible! (all software and drivers were properly installed ... of course only one program at a time)

Pinnacle Tech Support emailed me to say that THEIR Dazzle DVC170 will not work with THEIR Studio for analog capture and that they couldn't get it to work, either!