Well you gave me the ideas and I sent MS and I tried taking the horns by the balls - and uninstalled the offending exclamation marks and restarted with my device unconnected - it was a Nova -T Stick - and noticed some more exclamation marks in Device Manager and deleted them too! Re-connected and all is well.
Net result no more ex marks and my TV stick now works and I am very busy watching Mr Murray.
Thanks guys. A message there I reckon.