Support » Plugin: Defender Security - Malware Scanner, Login Security & Firewall » Malware scanner doesn’t work

  • Resolved shanghailander



    All my (free) Defender modules (? is that the right word?) worked beautifully until two updates ago! I can’t say that the other modules don’t work but the Malware Scanner
    definitely DOES NOT!

    I was hoping that when the most recent Defender update happened that the malware scanner would be back to normal but it still doesn’t work 😕

    I press the scan button and – in the past – I’d wait just a few seconds and it would start working.

    Since 2 updates ago, I press the scan button and go and get a cup of coffee, or vacuum the house, and nothing happens, so I click the Cancel X.

    When I do that, I get a blue line in the box and on the left, by the spinning wheel, it says “undefined %” and at the top of the page there is a box which says “Error during scanning”!

    I took a screenshot but I see I can’t upload any photos to show you so I made a page on one of my sites and uploaded the screenshot there, fpr easy referemce.

    I have 2 websites and they each have a different theme, so I know it’s not that causing the problem.

    I deactivated all my plugins and then reactived them one-by-one to see if it was a plugin which caused the problem, but no luck! Most of the plugins were there when the scans were working perfectly.

    Can anyone please offer some advice? I am in my mid-70s and am a real technophobe so I would be unable to understand any really technical advice but any help would be very much appreciated!

    Thank you in anticipation 😊

Viewing 9 replies - 16 through 24 (of 24 total)
  • Plugin Support Patrick – WPMU DEV Support


    Hi @shanghailander

    Thank you for the update.

    I would suggest the same as Hostgator support, please disable other security plugins, we always suggest not using multiple plugins at the same time.

    Also, try to run the test that I sent in the previous reply, if the Defender or any security plugin added the WPMU DEV IPs or the Server IP in the blocklist it would prevent the scan.

    Please, keep us posted, A Happy Easter too
    Best Regards
    Patrick Freitas

    Thread Starter shanghailander


    Thank you, Patrick – I will try what you suggested and will let you know how it goes. It probably won’t be until Tuesday, though!

    Happy Easter to you too!



    Plugin Support Adam – WPMU DEV Support


    HI @shanghailander

    No rush, just try it when you got time but please update us here (whenever it suits you) so we could either continue troubleshooting this or we’d know that if it worked for you.

    Best regards,

    Thread Starter shanghailander


    Hi Adam

    I took out all the banned IP addresses from Defender and tried to scan but it still didn’t work.

    The wheel on the left goes around and around but just to make sure, I left it for almost an hour and nothing happened 😞



    Plugin Support Kasia – WPMU DEV Support


    Hello @shanghailander ,

    Could you send us a message through our contact form, click here, in the subject, please add “ATTN: Kasia Swiderska” and in the content paste this ticket URL “”

    kind regards,

    Thread Starter shanghailander


    Hi Kasia

    I’m afraid I am not a Premium member of Defender so am unable to use your contact form!

    Is there any other way of doing this?



    Plugin Support Adam – WPMU DEV Support


    Hi @shanghailander

    so am unable to use your contact form!

    Is there any other way of doing this?

    Yes, simply drop us a regular e-mail at but make sure to use only this as e-mail subject:

    ATTN: Kasia Swiderska


    ATTN: Adam Cz

    and to include mentioned URL in the message:

    It’s very important as otherwise the message may not reach us.

    Best regards

    Thread Starter shanghailander


    Thank you so much for your recent comment, Adam.

    I sent the email to where I was instructed to, with the names as told, and I got this reply …

    `Hey there,

    Thanks for emailing in.

    Your email has been assigned over to Kasia, she will be in touch shortly.`

    Cheers ❤


    Plugin Support Predrag – WPMU DEV Support


    Hello, we haven’t heard from you in a while so we will mark this ticket as resolved.

    If you have any followup questions you can reply to our email or reopen the ticket.


Viewing 9 replies - 16 through 24 (of 24 total)
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