I have a 5.1 surround sound setup. It works fine when i use it with my tv, radio, dvd player, and laptop. When I hook up my desktop instead of my laptop only the center speaker and the two right speakers play and the left speakers just make a small static noise. When my laptop is connected all 5 speakers play fine, but I would prefer to have it setup through my desktop. My laptop has windows vista. My desktop has windows xp. On my desktop I went into control panel/sound speach and audio devices/change speaker settings. Then went to the advanced menu for speakers settings where there is an option to choose which type of speaker setup you have. I changed it to 5.1 surround sound speakers but nothing changes. No matter which setting I change it to nothing different happens. Any suggestions on what else I should try? Thanks for the help.