This took me a little bit to figure out, so hopefully this will save someone else some work. Your mercurial configuration file should be named "mercurial.ini" and should live in %userprofile%, e.g. C:\Users\Rob\mercurial.ini. You may name your global ignore file anything you want, e.g. hgignore.ini, and place it anywhere you like. I prefer to keep it with my mercurial.ini file, so it also lives in %userprofile%, e.g. C:\Users\Rob\mercurial.ini. Then you place a line in your mercurial.ini file that...