What Does The Add in Symantec Antivirus Vpmsece4.Dll Cannot Be Loaded Mean?

The Problem
The Outlook email plug-in for Symantec AntiVirus 10.x is not removed from Outlook after installation of Symantec Endpoint Protection 11.0, resulting in malfunction and the troublesome error message. The message confuses users in not providing adequate information or complete instructions to correct the problem. Users are prompted to contact the add-in manufacturer or uninstall the add-in.
Symptoms
Users receive messages to select the detect and repair option located in the help menu, as well as warnings that C:\Program Files\Symantec AntiVirus\vpmsece4.dll could not be loaded. Users are additionally warned they are out of memory or system resources and missing a .dll file, all of which are not necessarily accurate.
Solutions
Users should fully remove Symantec Antivirus Vpmsece4.Dll prior to upgrading to Symantec Endpoint Protection 11.0, including removing extend.dat files that Outlook and Symantec use to store add-ins. The registry should be cleaned to ensure the computer reads clear pathways between programs.