Is your VMS4 working ok? or is that having issues too?
When the Mixtrack Pro is connected, could you please go into the control panel again, then to "device manager".
Please look in Universal Serial Bus Controllers and you will find something called "USB composite device". There may be more than one of these so to help you identify which one is your Mixtrack Pro, disconnect the unit, then reconnect, it should then become clear as to which device it is in the list.
Once you have identified which USB composite device it is, right click and uninstall. You will then need to once again, disconnect and reconnect the unit. This will re-install the drivers.
Additional to that, ensure it is not selected as a sound device in your "Sounds and Audio Device Properties", for either Playback OR recording.
Let me know how you get on.
11:00 PM, 20 Dec 2011
This help request has been closed due to inactivity.