I have Internet Security 2013, version 20.4.0.40 on a desktop PC with Windows XP and using Outlook 2002 for my email. I have noticed that my email protection is not consistent. Some emails are being sent to the Norton AntiSpam folder but others are not. In some cases, there are duplicates - one in the AntiSpam folder and one in the Inbox. I have been "teaching" the system which emails are spam and even get the message stating that it is learning. Is this a known problem? Why would there be inconsistencies? If you need additional information about my system, please reply and let me know. Thanks in advance for your help. Kris