Hello All I have just built a new PC based on the GA-K8NXP-9 motherboard - everything was working a treat. All of a sudden the sound does not appear to work at all. When I try to use the volume control on WinXP it says:- There are no active mixer devices available. To install mixer devices, go to Control Panel, click Printers and Other Hardware, and then click Add Hardware. Any ideas what I should be looking for? Any advice much appreciated. Thanks Mike Clements Any ideas how I should proceed?