If your installation of EndNote fails while the Export Helper add-on is being installed, this is because of a known issue currently being investigated by the software developers. Export Helper is not required if you use Firefox as your browser because Firefox allows exports to be opened without an add-on.
When installing EndNote, choose the custom installation option and disable the Export Helper feature by unticking its checkbox. Installation should now proceed without issue.
If you are still having EndNote installation issues contact ITS by calling 64 3 479 8888 or 0800 479 888 or emailing email@example.com
If you still require Export Helper, it can be downloaded separately as a stand-alone installer.