I may be mis-remembering, but wasn't the interface test part of the WDM init routine? IIRC, it stopped being an annoyance when I switched to ASIO. sjhscoach, you might try using the ASIO driver and see if that works better. I should add the caveat that the only time I ever installed SONAR on a laptop (it was SONAR 5), I couldn't get ASIO to work due to the crappy RealTek interface and had to resort to MME. That was circa 2005, though, and may no longer be relevant.