one final last despairing effort. i've reread the thread again and it seems you've not ever tried MME drivers. I know you can't record with them but just to see if BIAB playback works ok please select an all RealTracks style, choose MME and listen with phones through the headphone output on the laptop. disconnect the behringer completely. does BIAB playback sound ok? please report back as that will be the very last test i can think of.