Windows 8 and 8.1 Forums


Stop Windows Defender Updates

  1. #1

    Stop Windows Defender Updates


    Hey guys today I restored by backup from win 10 through its downgrade option, and now when I use windows update to check it offers me a 133mb defender update even though I have avast premier installed. Avast was installed before I upgraded to 10 (and still have it now).

    Every time I hide the defender update it still reappears for download, is there anyway to get it off the list for updates, so it stops appearing, I have tries various microsoft update repairs but none fix it. (like windowsupdate.diagcab, windowsupdatediagnostic.diagcab etc).

      My System SpecsSystem Spec

  2. #2


    Is it safe to assume that Windows Defender disabled (off)?
      My System SpecsSystem Spec

  3. #3


    Yes it is off. I have been using Avast for about 3 weeks now, upgraded to win 10 a few days ago, then downgraded back to win 8.1 tonight, and thats when the defender update happened.
      My System SpecsSystem Spec

  4. #4


    Can you access Windows Defender user interface (see below)?

    Click image for larger version

    Go to to Tools > Options > Automatic scanning and check to see if "Automatically scan my computer (recommended)" is unchecked. Then go to Real-time protection and make sure "Use real-time protection (recommended)" is unchecked.
      My System SpecsSystem Spec

  5. #5


    Yes, real protection is off, I think I know what the problem is, when I had win 10 installed I used a script stop the defender service, as when I try to restart it, it gives the following error:

    Error 577: cannot verify digital signature.

    Not too worry as I think I will just do a fresh reinstall of 8.1 in the morning as it is after midnight now.
      My System SpecsSystem Spec

  6. #6


    Okay, I was going to ask you to disable Windows Defender in Services and rerun Windows Update which should stop Windows Defender from showing up in updates.
      My System SpecsSystem Spec

Stop Windows Defender Updates
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