Hello, I have a Dell Dimension E521. It has been a fantastic computer but I decided to go ahead and upgrade to Vista from XP. Much to my dismay, doing somehow canceled out my audio device. Currently, my computer is telling me there is no audio device installed and that it cannot find one. I tried all the typical things, updates from the company, searching on the internet for other with a similar problem, trying to add the hardware, etc, however I have yet to find anything in particular that works. Does anyone have any ideas on how I can fix this? Also, for the record, I do not even remember for sure what my audio devices name was. It was nothing after market. I would sincerely appreicate any light anyone can shed on this. Thanks.