So I have a flat screen iMac running 10.3.9 with all updates except the latest security. The HD is set to never go to sleep. The screen is set to sleep after 10 minutes. I will leave the computer one night and by the next night it has logged out to the log in screen with the four log-in user names listed. I have looked in system prefs under accounts, energy saver, login, etc and found nothing that is making this happen. I have changed nothing except done regular updates when they are released (except the last one obviously) Any ideas what the heck has happened. I searched the forums here and on apple and found nothing...it is a major pain to log back in and start up all 6 or 8 apps I use. sorry for all caps on help- not that drastic of a situation- kids were distracting me while typing!