If you receive an "authentication error" when starting Social Booth, do the following:
- Right click on Social Booth
- Click "properties"
- Click "compatibility" tab
- Select "run this program as an administrator"
- Click "apply" and then "ok"
- Re-run Social Booth
- Press "change when these notifications appear"
- Move the bar all the way to the bottom so that it's "never"
- Re-run Social Booth, the error should now be cleared