Ms. Outlook: showing error message ".....Symantec 'vpmsece3.dll' add-in causing outlook 2007 error message when mail opened

please go to current profile then search file: extend.dat. usually on the C:\Documents and Settings\your profile\Local Settings\Application Data\Microsoft\Outlook. Delete that file and restart the PC.

http://www.experts-exchange.com/Virus_and_Spyware/Anti-Virus/Desktop_Anti-Virus/Q_22720070.html