ESET Outlook Plug-in error when starting Microsoft Outlook

KB Solution ID: SOLN767|Last Revised: November 14, 2014


  • you receive the following error message when starting Microsoft Outlook:

    The Add-in 'ESET Outlook Plugin' (C:\PROGRA~1\ESET\ESETNO~1\EPLGOU~1.DLL) cannot be loaded and has been disabled by Outlook. If no update is available, please uninstall the Add-in.
  • The error message above may occur on a computer with multiple user profiles after an upgrade, reinstall, or failed uninstall of ESET Smart Security.


Click your version of Microsoft Outlook below to view the corresponding solution

Microsoft Outlook 2003 | Microsoft Outlook 2007
| Microsoft Outlook 2010

Microsoft Outlook 2003

Solution 1:

  1. Click the Tools > Options and select the Other tab.
  2. Press Advanced settings > Add-ins Manager and deselect the ESET Outlook Add-in.
  3. Click OK to confirm the selection.

Solution 2: You can install Office 2003 Service Pack 3 to resolve the error message. Click the link below to visit the Microsoft Knowledge Base:

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Microsoft Outlook 2007

  1. Click Tools > TrustCenter.
  2. All active, non-active and disabled add-ins will be displayed.
  3. Click the ESET Outlook Add-in and click Go. This will then open the COM add-ins page. You can deselect the ESET Outlook Add-in.
  4. Click OK to confirm the selection.

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Microsoft Outlook 2010

  1. Click File > Options.
  2. Click Add-ins.
  3. Select the ESET Outlook Add-in from the list of add-ins and then click Go.
  5. Deselect the check box next to ESET Outlook Add-in and confirm by clicking OK.

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