Windows 10: Updating Defender Definitions.

Discus and support Updating Defender Definitions. in AntiVirus, Firewalls and System Security to solve the problem; can't update the definition... Discussion in 'AntiVirus, Firewalls and System Security' started by JosephNavarroza, Sep 5, 2018.

  1. Updating Defender Definitions.

    can't update the definition

    JosephNavarroza, Sep 5, 2018
  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, Sep 5, 2018
  3. Definition Update for Windows Defender - KB2267602 (Definition 1.225.3124.0) - Error 0x80070643


    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
    • Click on the Find and Fix problems tile and then click on the
      view all button the left pane.
    • Click on the Windows update
      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.

    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:

    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

    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, Sep 5, 2018
  4. jawinters Win User

    Updating Defender Definitions.

    defender definition updates fail

    Hi Brink. I got a link to this forum from a thread I created on the Microsoft answers site. Not sure if this fix will address the issue of Defender definition updates failing to install and generating an error message whenever Windows Update downloads the latest defs. Here is an example of the message:

    "Definition Update for Windows Defender - KB2267602 (Definition 1.213.2537.0) - Error 0x80070643"

    I have contacted MS 3 times and others have done the same or suggested fixes that they thought might work to no avail. The problem boils down to MS policy in Win 10 to download all updates whether you want them or not. Since I am using Norton Internet Security Defender is turned off but MS insists on downloading the updates and the design is so poor that the updates fail if Defender is off. I have suggested 3 options to MS but all they do is hide the failed update temporarily only to have the next one fail again. As a former programmer it seems to me there are 3 options to stop these error messages:

    1- don't try and install definition updates when Defender is off.2- allow the files to be installed even if Defender is off. This would not only not hurt anything but would keep the definitions current so if I ever do decide to switch to Defender I will have the most current definitions available. (seems like the best option to me)
    3-if Defender is off just squelch the error message as it is NOT REALLY AN ERROR IT IS DESIGNED TO DO THAT?

    My question to you is I don't have a problem with Defender being on or off I have a problem that since it is off I get error messages whenever Update runs. Is this going to stop the error messages or will it just ensure that Defender is off and because of the piss poor design of Update continue to have the definition files fail to install and error messages to be generated? Thanks.
    jawinters, Sep 5, 2018

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