Windows 10: Windows 10 Defender updates failed

Discus and support Windows 10 Defender updates failed in Windows 10 Installation and Upgrade to solve the problem; Hi, when trying to update Defender threat definitions I get the following error codes 2147012721, 2147012866 and 2147012894. I have tried manually... Discussion in 'Windows 10 Installation and Upgrade' started by JayBee66, Feb 1, 2019.

  1. JayBee66 Win User

    Windows 10 Defender updates failed


    Hi,

    when trying to update Defender threat definitions I get the following error codes 2147012721, 2147012866 and 2147012894.


    I have tried manually downloading the definitions using mpam-fe which does not seem to work also the Windows update troubleshooter which says the following:


    Issue found


    Potential Windows update databse error detected Detected

    Repair Windows update database corruption Not run


    Windows update components must be repaired Fixed

    Repair windows update components Completed


    None of these actions has helped and I am asking for suggestions on how to proceed.


    JayBee

    :)
     
    JayBee66, Feb 1, 2019
    #1

  2. Windows 10 fails to update


    When you finish testing the Avast suggestion, make sure that you restart your machine.

    Then if the issue persists, please return to the trouble shooting list in post# 89

    I think there are three steps that remain; the WU troubleshooter, reset WU components, and manual WU reset.
     
    Slartybart, Feb 1, 2019
    #2
  3. jds21 Win User
    Windows Updates failed to instal

    I just did step one and they have just all installed.... thank you so much.... it was quite frustrating having that update window pop up every 5 minutes and failing to instal every time

    Thanks mate
     
    jds21, Feb 1, 2019
    #3
  4. jsfitz54 Win User

    Windows 10 Defender updates failed

    Windows 10 Anniversary Update Issues

    Problems with W10 Anniv auto update:

    Mom's: (x58 Xeon 5677) Windows Defender was not turned back on automatically (it was "on" in the 1511 edition) and she had a Trojan. Full system scan to eradicate.
    Her Epson printer was knocked off, had to uninstall by Device Manager pull USB cable and reconnect cable. W10 did the rest.

    Step-mom's: (HP pre built) Windows Defender not turned back on by default. Her USB Seagate Expansion Drive 2Tb was offline so all backup routines were halted. Had to rerun backup plan. Had her do a full virus scan.

    Step-dad's: (Dell Optiplex tweaked upgrades) Windows Defender not turned back on by default. Full Scan.
     
    jsfitz54, Feb 1, 2019
    #4
Thema:

Windows 10 Defender updates failed

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