After installing (and eventually uninstalling) SP1 for Vista, I get no sound. If I click on the Volume Mixer icon it says "no audio device installed". However, all the indicators in the Device Manager say it is working. I have uninstalled and reinstalled virtually every Realtek driver available for Vista and HP. I have checked in BIOS and set the on-board audio to "enable", but still no sound. Before I go insane, does anyone have any suggestions?