Had a thought, when I boot into Zorin 16 Lite off USB the Mouse and Touchpad options differ from Pro.
Under Device I can select my USB mouse, touch pad and the ELAN (touchscreen) and each has its own toggle screen.
Disable the touch pad and the ELAN - things work perfectly (after 15 mins testing!).
These settings are not in Pro ... how can I mimic these settings in Pro?