I went off on this topic on the other forum. The issue as I see it is with the USB driver when it is set in 'Advanced' mode. For me at least, when I have the USB driver set in 'Standard' mode, all is well. The 'Advanced' mode has a tendency to crash Guitar Rig 3 and Sonar. It locks up my soundcard and requires a reboot because the processes cannot be killed. To quote Rick James... I wish I had more hands, so I could give it more thumbs down.