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998 Views 2 Replies Latest reply: Mar 7, 2012 7:47 AM by Fnurgg RSS
Fnurgg Apprentice 80 posts since
Mar 17, 2008

Has received 1 of 9 achievements.
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Mar 2, 2012 1:56 AM

Unable to load the antivirus engine.



We upgraded to LANDesk 9.0 SP3 yesterday and now some users are getting the following error message when opening outlook:

Unable to load the antivirus engine or reload pattern files.

Reason: Unknown failure (0x80070424). Code -2147023836 (0x80070424).

Please contact your IT representative for repair options.


Anyone have a clue what this error is about and/or how to fix this?


Kind regards


  • Sundiata Kita-Bradshaw Apprentice 132 posts since
    Mar 22, 2010

    Has received 3 of 9 achievements.
    Currently Being Moderated
    1. Mar 2, 2012 9:14 AM (in response to Fnurgg)
    Re: Unable to load the antivirus engine.

    Odd error to display  once Outlook opens but it appears that there may be an issue with the Outlook add-in. [The error is normally "LANDesk Antivirus unable to load the antivirus scan engine. Error- 2147024809 (0880070057)"]


    Have you already tried disabling the Outlook add-in? If this does not resolve the issue you can try reinstalling just the AV before reinstalling the entire agent. To remove the AV open a command prompt and browse to "\Program Files\LANDesk\LDClient" and run "vulscan.exe /removeav". I recommend rebooting before reinstalling. Return to the same folder using command prompt and run "vulscan.exe /installav".


    If this still does not resolve the issue, I once resolved a add-in issue by just replacing the dll from a working computer. I did this after reinstalling the AV and agent and for some strange reason this resolved the issue. The dll is "LDOutlAddin.dll" under " \Program Files\LANDesk\LDClient\Antivirus"

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