Windows Defender Security Intelligence version fails to Update

Anirban Goswami 0 Reputation points
2026-09-18T13:02:52.66+00:00

Screenshot 2026-09-18 173945

Screenshot 2026-09-18 174134

Can update using the offline installer, mpam-fe.exe
Files from Farbar Recovery Scan Tool FRST.txt Addition.txt
I had installed Malwarebytes sometime back; switched back to Defender when the trial expired.

Windows for home | Windows 11 | Security and privacy
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3 answers

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  1. _AW_ 69,241 Reputation points Volunteer Moderator
    2026-09-18T23:13:57.68+00:00

    Malwarebytes is still showing as installed and running. You also have active malware running that the following fixlist will address.

    • Download Fixlist.txt and save it to the D:\Setup folder where FRST64.exe is located.
    • Close any apps with unsaved work.
    • Run FRST64.exe and click Fix.
    • The computer will reboot to complete the process.

    Please upload Fixlog.txt so I can check if any further action is needed.

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    2 people found this answer helpful.

  2. Lester Bernard Reyes 84,820 Reputation points Independent Advisor
    2026-09-19T17:06:05.14+00:00

    Hi, thank you for replying, the threat might already be removed or quarantined, moreover, if you still have an issue that the device is managed by an organization, I suggest doing an in-place upgrade, wherein it will upgrade the device to the latest version and repair all issues without deleting any files.

    Go to the Windows 11 website: https://www.microsoft.com/en-us/software-download/windows11

     

    Under Download Windows 11 Disk Image (ISO), select Windows 11 (multi-edition ISO)

     

    1.    Once done downloading the ISO, kindly right-click on the ISO, then click Mount>click Setup.exe

    2.    You may be prompted by User Account Control. Click on Yes if so

    3.    In the Install Windows 11 dialog, click Next

    4.    Setup will check your PC and show a license agreement. Click on Accept in the license terms dialog.

    5.    Wait for the setup program to check for the available free space.

    6.    On the Ready to install page, make sure Keep personal files and apps has been checked.

    7.    Then click Install and just follow the prompt.

    8.    Windows 11 will restart your device several times and lead you to the lock screen. Depending on the options you set, it will keep all your files, apps, and user accounts.

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  3. Lester Bernard Reyes 84,820 Reputation points Independent Advisor
    2026-09-18T16:39:48.4133333+00:00

    Hi, I'm Bernard. I'm happy to help!

    This happens when there is a corrupted file in the Windows Defender folder or a reconfiguration is needed. First, you need to check if you have a work or school account:

    Open Settings> Click Accounts> Click Access work or school, then disconnect the account there. If there is no account, or already disconnected and you have the same issue, follow the steps below:

    Note: Before doing the steps, I suggest completely uninstalling the third-party antivirus first.

    Reinstall Windows Defender:

    Open the registry, then go to

    Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
    

    Then delete the Windows Defender folder, restart the PC, and recheck it.

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