After considerable time and effort, I managed at last to find the correct Sound Max driver for this machine. The history is: Bought a used machine Compaq EVO d310, for personal and not technical reasons I must use Win2k O/S, HP does not provide drivers for Win2k Only for XP. When I finally got the right driver, at the next boot I received an alert "No adi codec driver found". In the device manager, all audio functions display as working properly. Now what???