Fix Vpmsece4.dll could not be Loaded or Out of Memory Error

Vpmsece4.dll is a module that belongs to Symantec Corporation?s Symantec Antivirus.

Error Message

Opening Microsoft Outlook produces the following errors.

The add-in 'C:\Program Files\Symantec_Antivirus \vpmsece4.dll' could not be installed or loaded.
This problem may be resolved by using the "Detect and Repair" in the Help menu.

Unable to load “C:\Program Files\Symantec AntiVirus\vpmsece4.dll.
You may be out of memory, out of system resources, or missing a .dll file.

Even if you use the Detect and Repair option as suggested, the error persists. You may also have more than enough memory available to run the program but the error is still present. The error is still present even if all other programs are closed.


These errors are caused by the Microsoft Outlook email plug-in for Symantec AntiVirus 10.x. This email plug-in is not removed after migrating to Symantec Endpoint Protection 11.0.


Follow these instructions to remove the vpmsece4.dll error if your are using NavNT or Symantec AntiVirus 8.x or an even earlier version

How to Fix Vpmsece4.dll could not be Loaded or Out of Memory Error

Method 1

Microsoft Office 2003

  1. Open Microsoft Office 2003.
  2. Go to Tools at the top of the page.
  3. Go to Options.
  4. Select the Other tab.
  5. Go to Advanced Options.
  6. Proceed to Add-in Manager.
  7. Uncheck Symantec AntiVirus 10.

Microsoft Outlook 2007

  1. Open Microsoft Outlook 2007.
  2. Go to Tools and then proceed to Trust Center.
  3. Select Add-ins.
  4. Go to Manage.
  5. Uncheck Symantec AntiVirus 10. in Com add-ins, Exchange client add-ins and Disable add-ins.
  6. Restart Outlook.

Method 2

  1. Close Outlook.
  2. Set Windows to show hidden and system folders.
  3. Go to Start.
  4. Click on Search and then go to For Files and Folders.
  5. Type in extend.dat in Search for files or folders named.
  6. Click Search Now.
  7. Wait for the search results to come up.
  8. Delete all copies of exend.dat.
  9. Reboot the computer.

A Group Policy may be in effect that prevents extend.dat from coming up when you search for this file. Use the command prompts below to find and delete extend.dat.

  1. Close Outlook.
  2. Click Start and go to Run.
  3. Type in cmd in the box that opens.
  4. Press OK.
  5. Type in the following command at the command prompt.
    cd %appdata%
  6. This prompt should show the Application Data folder. If this folder does not show up, use the full path to the current user?s Application Data folder like the example presented “C:\Documents and Settings\\Local Settings\Application Data”
  7. Type cd microsoft\outlook.
  8. Press Enter.
  9. Now type in del extend.dat.
  10. Press Enter.
  11. Delete extend.dat for every user local account on the computer.
  12. Reboot your PC.