TY for this info. Just setting up a new laptop (w Windows 7) and it won't let me save the changes in notepad, saves I don't have permission to save in this location and to contact administrator. Any ideas anyone?
EDIT: Okay, I found elsewhere that you should just save the file elsewhere and copy it where it needs to be. So I did that, and now in the postgres 'data' folder I two postgresql.con files. Under 'type', the original says 'conF file' and the revised one says 'text' file. If I just delete the original will postgres use the 'text' file?