1 Mar

The Add-in “Kaspersky Mail Checker” cannot be loaded and has been disabled by Outlook

This article applies to Outlook 2007.


When you open Outlook you get the following message:
“The Add-in “Kaspersky Mail Checker” cannot be loaded and has been disabled by Outlook”.


The easiest way to fix this error is to disable the Add-in altogether. If you don’t wish to use it or have uninstalled Kaspersky and still receive this message then do the following:

  1. Open Outlook 2007.
  2. Go to Tools -> Trust Center -> Add-Ins
  3. At the bottom of the menu you’ll see “Manage”
  4. Select “Exchange Client Extensions” in the drop down box
  5. Select “Go”
  6. Uncheck the “Kaspersky Mail Checker”
  7. Click OK.

If you would like to keep the Add-in then follow these instructions:

  1. Close Outlook.
  2. Click the Start button (Windows XP users should then click Run).
  3. Type the following: (Change the path names depending on your version)
    regsvr32 -u “C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 7.0\mcou.dll”
  4. Then do the same again, except this time type:
    regsvr32 “C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 7.0\mcou.dll”

57 Responses to The Add-in “Kaspersky Mail Checker” cannot be loaded and has been disabled by Outlook

  1. Wonderful thank you, have been searching for this for ages.

  2. No problem 🙂

  3. thanks a lot..

  4. It Worked!!!! Thank YOu so much!Leona

  5. thanks a lot it works very fine!

  6. It worked like a champ…thank you!

  7. thanks a lot, it works

  8. thanks a lot..

  9. this is beautiful!

  10. Thanks for the help!

  11. Gr8 Job…….Thanks

  12. thanks a lot, it works

  13. This is wonderful……long live.

  14. Thanks very much.. This is wonderful. i am able to disable mail checker. My regards

  15. Thank you very much..its worked

  16. thanks it works thanks again

  17. Thank you so much. I started getting this error and after ten minutes it drove me crazy. You saved me a lot of frustration lol

  18. it worked. Thanks for posting the solution. i was starting to be mad of clicking yes.

  19. Thanks it worked

  20. Thx it works

  21. Many many Thanks dear

  22. Thanks,problem resolved.

  23. Thank you very much perfect

  24. Thank you Very Much

  25. thanks a lot

  26. thanks man it’s work

  27. Thanks!

  28. very nice advice, i like it
    Thanks for the writter

  29. Thank you, it works; appreciate your advice I do

  30. mirza yusuf beg February 29, 2012 at 08:08

    Thanqs dear……

  31. Great ..thanks

  32. Mwijuka Joseph March 16, 2012 at 07:24

    This was too helpful “i used the first solution to fix this error_disable the Add-in altogether” Kind thanks for your helpful postings.

  33. thanks a lot
    i felling this problem for long time

  34. Thanks a Lot…. 🙂

  35. Great job! it really keeps me feel safe from this headach

  36. Martin Katalemwa May 2, 2012 at 17:58

    You are a genius. It worked. I almost run mad with the error message pop-up. God bless u. What use are add-ins anyway?

    • Carl Norton May 3, 2012 at 14:57

      I’ve never used it personally but I believe that it was mainly used as a SPAM filter.

  37. This works fine for the currently logged in user. For imaging/deployment we’d like to ensure that this fix applies to ALL USERS before we deploy the image. Any way to do that?

    • Carl Norton May 16, 2012 at 15:52

      Try creating a batch file to run during deployment with these commands:
      (Change the folder to the correct one for your version)

      regsvr32 -u “C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 2012\mcou.dll”
      regsvr32 “C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 2012\mcou.dll”

  38. Chesley Chen May 21, 2012 at 02:37

    Thanks a lot for your help!

  39. Sammy Bragar July 16, 2012 at 09:59

    Thanks guys.

  40. I use office 2010 on a win 7 64, the unreg and reg again works, but I have a problem saying no email program is associate or installed. and out look does not work at all..
    my data is there but can not send/receive, say action not implemented!!
    any comments?
    thanks a milion

  41. Many thanks, it works!

  42. 🙁 it don’t work i do the following but it don’t work please help me haw do you do ??????????????????

  43. Thanks.. IT works

  44. Thanks for the easiest solution that you given.
    Thanks for giving the wonderful solution.

  45. Thank u very much it was very very nice hints

  46. This is a very good article and thanks for sharing the knowledge.

  47. Thanks..
    its solved my problem.

    thanks a lot

  48. REALLY helpful. Thank you!

  49. thanks man

  50. Thanks For good tutorial…..

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