Paul-Tikkanen sent me a link to another driver, but that didn't work either, at least not yesterday. Curiously, having had absolutely no success for 3 days, the Bluetooth started working when I booted up this morning. Of course with this machine that doesn't mean it'll be working tomorrow! I take everything one day at a time with this unenviable Envy.
As for the heasdset I obviously didn't make myself clear. It is a Quiet Comfort 15, noise -cacelling headset. No Bluetooth there. I'm using a Bluetooth "receiver", a little gizmo that the Bose headset plugs into.