After W10 Update KB4058043, I was unable to load IE11 and CCleaner V5.38.6357(64) stopped installing half way along the green bar.
In the process if finding why IE11 would not load, I was advised by Microsoft Community if I had Trusteer on my comp, if so to delete it.
This I did and immediately IE11 functioned correctly as did the latest update of CC V5.38.6357
So if others may have a problem then maybe removal of Trusteer may be the solution.