Windows 10: Windows Defender Definition Updates

Discus and support Windows Defender Definition Updates in Windows 10 Installation and Upgrade to solve the problem; I have a Toshiba Satellite P875-S7200 & also a Dell Inspiron17 (series 5000). Both computers have Windows 10 64-bit. The Toshiba has version 1809 on... Discussion in 'Windows 10 Installation and Upgrade' started by cindy246, Jul 7, 2019.

  1. cindy246 Win User

    Windows Defender Definition Updates


    I have a Toshiba Satellite P875-S7200 & also a Dell Inspiron17 (series 5000). Both computers have Windows 10 64-bit. The Toshiba has version 1809 on it and the Dell has version 1803 on it. On both computers all updates seem to install without issue except the Windows Defender Definition updates. The definition updates have stopped installing. I have Windows Defender turned off as I am using Avast Internet Security as my antivirus program. In the past the Windows Defender definitions always downloaded & installed regardless that I am using a 3rd party antivirus but for quite some time now they have stopped. I cannot recall exactly when this started but I think it was after some Windows Update a while back. Did one of those previous Windows updates have some feature that disabled the definitions update if Windows Defender is turned off? Why have the Windows Defender definitions stopped installing? (Good thing I am using Avast since Windows updates don't seem to be reliable)


    Thank you to anyone who has an answer to this.

    :)
     
    cindy246, Jul 7, 2019
    #1
  2. FredWall Win User

    Windows Defender Definition Updates.

    Thank you Elba for the prompt reply. However, there is a problem: In "Control Panel" under the "Programs and Features" page > "View Installed Updates" the " Windows Defender Definition Updates" are NOT listed. Consequently, I cannot delete/uninstall them.
    The same thing happens when I use "Settings" >" Updates & Security" > "View Update History". Here the Definition Updates are all listed but I can't uninstall them either. Any other suggestions?

    Thanks again, Fred
     
    FredWall, Jul 7, 2019
    #2
  3. Definition Update for Windows Defender - KB2267602 (Definition 1.225.3124.0) - Error 0x80070643

    Hello,

    With the issue description, I understand that you are getting the error code for Windows Defender Error 0x80070643. I will certainly help you.

    KB2267602 is the latest Definition update for Windows Defender. I would suggest you to follow the suggestion as a workaround given by
    johnhawk88 replied on 24, 2015 and check if it helps.

    Definition Update for Windows Defender - Error 0x80070643

    If issue persists you may try the steps given below and check if it helps.

    Method 1: Windows Update troubleshooter.

    Run the Windows Update troubleshooter to try and fix the issue. Refer to the link to run the troubleshooter:

    I request you to run the Windows Update Troubleshooter and check it helps.

    • I search bar Type Troubleshooter and click on
      Troubleshooting;
    • Click on the Find and Fix problems tile and then click on the
      view all button the left pane.
    • Click on the Windows update
      troubleshooter
      and run it.


    Method 2: Reset Windows Update components
    and test the issue.


    I suggest you to reset Windows Updates Components. Resetting Windows Update Components and the Windows Update files helps to fix Windows Update errors.

    http://support.microsoft.com/kb/971058

    Disclaimer: Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow
    these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

    Backup the registry:
    http://support.microsoft.com/kb/322756/en-us

    Note: To reset the computer to normal mode after troubleshooting, please refer to “How to reset the computer to start as usual”
    from the above article.



    If the issue persists, I would suggest you to manually download the latest definition updates for Windows Defender.



    How to manually download the latest definition updates for Windows Defender

    http://support.microsoft.com/kb/923159

    Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.
     
    Kumar Ravi, Jul 7, 2019
    #3
  4. P4-630 Win User

    Windows Defender Definition Updates

    Task to auto update windows defender definitions disappears

    My mom has a new laptop with windows 8.1, we always set the windows updates to manual.
    On our other windows 8.1 computers I have created a task for auto updating windows defender definitions, which works fine for us.

    This is how I created this task:

    "Click on "Create Task", name it what you like (mine is Daily Signature Update), set the trigger as the time you want it to run every day.

    For Action browse to Program Files\Windows Defender\MpCmdRun.exe and select it. In "Add arguments" add -SignatureUpdate -MMPC"

    But somehow this task disappears once it has run on my mom's laptop.
    I'm logged in as admin and then I also tried it with running the task scheduler as admin, the task just disappears every day for some reason, while it works fine on our other windows 8.1 computers.

    Anyone an idea why this task disappears every time?

    Thanks.
     
    P4-630, Jul 7, 2019
    #4
Thema:

Windows Defender Definition Updates

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