Helping a friend with their Acer Aspire 5600. They reinstalled a vanilla version of XP (lost re-install disk) due to a virus. I installed all of the drivers from acer's website with them already, including the audio driver, but they don't have any sound. In the CP under audio, audio playback shows no devices installed. I have a moderate level of experience, but I don't know where to go next. Hopefully somebody could help us out.