I am on windows 10 and installed pathogen into home/vimfiles/autoload, and as far as I know all went well. Following the directions here, I installed nerdcommenter. I restarted gvim, tried :help nerdcommenter, and got E109 Sorry no help for nerdcommenter.
Can someone suggest a next step?
EDIT: the plugin itself did install (as shown in the gvim plugin menu); the issue is that the help files somehow are not associated or connected properly.