Windows 10: Windows Defender Definition update: not updating

Discus and support Windows Defender Definition update: not updating in AntiVirus, Firewalls and System Security to solve the problem; When I turned on my device and check for updates via the Windows update, the message states that your device is up to date. When I went to... Discussion in 'AntiVirus, Firewalls and System Security' started by PaulPChou, May 1, 2019.

  1. PaulPChou Win User

    Windows Defender Definition update: not updating


    When I turned on my device and check for updates via the Windows update, the message states that your device is up to date. When I went to https://www.microsoft.com/en-us/wdsi/definitions, I noticed that the definition version for mine is not up to date. Is Windows update not able to detect it? I went to Windows Security in my device to update it but same issue.

    :)
     
    PaulPChou, May 1, 2019
    #1
  2. P4-630 Win User

    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, May 1, 2019
    #2
  3. 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, May 1, 2019
    #3
  4. P4-630 Win User

    Windows Defender Definition update: not updating

    SEtting up automatic updates for windows defender on windows 8

    I have found this on the internet en have set up a task for automatic definitions update for Windows Defender but a window pops up when this starts to run.
    Is there a way to set this without any window popping up so that it just runs in the background?

    Now I'm using
    "C:\Program Files\Windows Defender\MpCmdRun.exe" -SignatureUpdate -MMPC

    I'm currrently using it as described here:
    https://forum.raymond.cc/threads/let-your-windows-8-defender-update-itself-automatically.34359/
     
    P4-630, May 1, 2019
    #4
Thema:

Windows Defender Definition update: not updating

Loading...
  1. Windows Defender Definition update: not updating - Similar Threads - Defender Definition update

  2. Windows Defender Definition Updates

    in Windows 10 Installation and Upgrade
    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...
  3. Windows Defender definition updates ...

    in Windows 10 Installation and Upgrade
    Windows Defender definition updates ...: Is there a problem with the Defender updates? As I keep running the update app and there have been no updates today (01/05/2019). The last update was yesterday (30/04/2019) it was - Definition 1.293.527.0...
  4. definition updates for defender

    in AntiVirus, Firewalls and System Security
    definition updates for defender: i have had 8 of these in one day was wondering if something is wrong 121010
  5. definition updates for defender

    in Windows 10 Support
    definition updates for defender: i have had 8 of these in one day was wondering if something is wrong 121010
  6. Updating Defender Definitions.

    in AntiVirus, Firewalls and System Security
    Updating Defender Definitions.: can't update the definition https://answers.microsoft.com/en-us/protect/forum/protect_defender-protect_updating-windows_10/updating-defender-definitions/01d2f8f4-51bd-48f3-b7d7-03f00f5c959d
  7. Windows Defender not updating to the latest definitions.

    in AntiVirus, Firewalls and System Security
    Windows Defender not updating to the latest definitions.: Bit of a strange one here, for the past 3 days I have not been unable to update to the latest definitions whether it be through Windows Update, Windows Defender, manual updates or through using a command prompt. The latest definition I had was 1.271.815.0 on 11th July....
  8. Windows Defender definition updates

    in AntiVirus, Firewalls and System Security
    Windows Defender definition updates: Has anyone else noticed that the size of the daily definition download has dramatically increased? Prior to FCU the average size for me was under 1mb, now it has balloned to just under 30mb. This is of course downloading via Windows Update.Is this some kind of unusual quirk...
  9. Windows Defender Threat Definitions Update?

    in AntiVirus, Firewalls and System Security
    Windows Defender Threat Definitions Update?: Normally by this time of day I've had one or two definitions updates. None since last night late: [img] Anyone got a later version this morning? 86263
  10. Windows Defender Definition Update

    in AntiVirus, Firewalls and System Security
    Windows Defender Definition Update: I have disabled Windows Defender in Windows 10, but the Windows Defender Definition Updates are still being downloaded and installed, these updates are wasting my hard disk space. Are there ways to stop downloading of these updates. 16433