Question/Issue:
When you start Microsoft® Outlook®, you see the following message: “The add-in ‘C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\vpmsece.dll’ could not be installed or loaded. This problem may be resolved by using Detect and Repair on the Help menu. Unable to load “C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\vpmsece.dll”. You may be out of memory, out of system resources, or missing a .dll file.” When Symantec AntiVirus 10.x is installed, the error message may reference the file vpmsece2.dll or vpmsece3.dll. Use of the Detect and Repair option, as suggested in the error message, does not solve the problem.
Solution:
To fix the problem, find and delete all copies of the Extend.dat file on the computer. A copy of this file exists for each local user account. Then, restart the computer.
To find and delete copies of Extend.dat from a command prompt
- Exit Outlook if the program is open.
- On the Windows taskbar, click Start > Run.
- In the Open box, type cmd and then click OK.
- At the command prompt type the following command and then press Enter:
cd “C:\Documents and Settings\<local_user>\Local Settings\Application Data”
where <local_user> is the name of the current local user.
- Type cd microsoft\outlook and then press Enter.
- Type del extend.dat and then press Enter.
- Delete the Extend.dat file for every user local account on the computer.