Be sure to launch Pro Tools to run as administrator:
Run as Administrator
This can help with various launch issues as well as a variety of MIDI issues (i.e., no MIDI output or
control surface communication) and using the Avid/Digidesign hardware driver in third-party DAWs.
- Right-click on the Pro Tools icon on your desktop.
- If using a third-party DAW, right-click on that application's icon instead.
- Choose Properties.
- Click on the Compatibility tab.
- Check the box that says "Run this program as an administrator."
- Click Apply and then OK.