Hi Guys, I've been trying to fix this problem for a few days now. I reformatted from XP a few days ago and am now running Windows 7. Ever since then I have not been able to get sound from my Altec Lansing speakers. However, if I plug in my logitech USB headphones they seem to work. I have read a lot of threads, most suggesting I download/install the Universal Audio Architecture and RealTek High Definition Audio device driver, which I have tried and have not worked. When I go into Manage Audio Devices, I only view "Digital Audio S/PDIF - high definition audio device, ready". I have show disabled devices and show disconnected devices already checked. If I'm playing music on youtube without my headphones, despite hearing no sound, the sound mixer at the bottom shows changing levels of audio. Any thoughts? Thanks!