After connecting a USB phone handset, Vista loaded the driver then
requested a reboot. I then realised that only the USB microphone device
showed up in Control panel/Sound/Recording menu. The USB speaker device
didn't register.

I plugged the handset in an other USB port. Driver loaded, did the
requiered reboot and this time both microphone and speaker are listed in
as USB sound device.

If I return the uSB hanseet to the first USB port, it has memorise the
driver setting and it still recognize only the microphone. How can I rest
the "driver memory" for this USB port. I imagine it's somewhere in the
registry but where ?

Thanks in advance

--
Alain Caillet