OK have found out that ATI's HDMI drivers are causing problems with my other sound devices and I am unable to delete them. Here is what I have tried so far: Uninstalled ATI drivers using the "lengthy" process of uninstalling them ...running driver sweeper..running registry cleaner etc etc to get rid of ALL ATI traces.... So I have a clean install with no ATI in sight. When I install the ATI drivers I UNTICK the box that says HDMI drivers (so it should not install them)...install drivers..re-boot...TADAAAA HDMI AUDIO DRIVERS ARE INSTALLED!!!! I have tried to uninstall them in device manager....disable them in device manager yet when I re-boot...TADAAAA there they are again!! Surely there must be a way to get rid of them?