Defender antimalware client update

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  1. Posts : 24,647
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #1

    Defender antimalware client update


    In Windows 10 version 1709, os build 16299.192, checking for updates shows a new update for the Windows Defender antimalware platform, to version 4.12.17007.18011



    Defender antimalware client update-anti-malware-update-19-jan-18.png

    Installed without a problem, no restart required. Defender before updating...

    Defender antimalware client update-defender-before-19-jan-18.png

    After the update...

    Defender antimalware client update-defender-after-19-jan-18.png

    As with previous antimalware client updates, the update doesn't show in Update History. It can be seen in Reliability History.


    Defender antimalware client update-reliability-history-19-jan-18.png

    Edit: 1st March - another update has been issued, version 4.12.17007.18022. Seems this is to be a regular monthly event.

    Microsoft said:
    This package includes monthly updates and fixes to the Windows Defender antimalware platform that is used by Windows Defender Antivirus in Windows 10.
    https://support.microsoft.com/help/4...lware-platform
    Last edited by Bree; 01 Mar 2018 at 07:01. Reason: new update
      My Computers


  2. Posts : 61,585
    64-bit Windows 11 Pro for Workstations
       #2

    Looks like the KB article hasn't been updated yet.

    https://support.microsoft.com/en-us/...lware-platform
      My Computers


  3. Posts : 17,831
    Windows 10
       #3

    ... sneaky, sneaky...

    Defender antimalware client update-000155.png
      My Computer


  4. Posts : 24,647
    10 Home x64 (21H2) (10 Pro on 2nd pc)
    Thread Starter
       #4

    This antimalware platform update is available for earlier version of Windows 10 too. Here it is for 1607...

    Defender antimalware client update-1607-antimalware-update.png

    Defender antimalware client update-1607-defender-updated.png
      My Computers


  5. Posts : 1,445
    Windows 10 Pro 64bit 20H2 19042.844
       #5

    Got it here, will have to update the laptop machine in the morning, slowly getting used to Defender, very slowly lol, almost thought of switching back to Avast, but think will stick it out with Defender, in fact removes it from my phone so I won't be tempted to go back to Avast on the desktops/laptop lol
      My Computers


  6. bru
    Posts : 377
    Windows 10 Home
       #6

    edit: I found it. Windows 10 has to be the most counter intuitive OS in history.

    Where do you find that System Information in your screenshot? I can only find Defender info when using the old GUI (and it has been updated afaict). So hard to navigate the new system imo.
      My Computer


  7. Posts : 11,390
    Windows 10 Home x64 Version 21H2 Build 19044.1706
       #7

    Bru,

    You can see the system information by opening Windows Defender Security Centre then clicking on the small Settings icon in its bottom-left corner & selecting About.

    By the way, the info shown by the old UI link is still correct.


    Denis
      My Computer


  8. bru
    Posts : 377
    Windows 10 Home
       #8

    Try3 said:
    Bru,

    You can see the system information by opening Windows Defender Security Centre then clicking on the small Settings icon in its bottom-left corner & selecting About.

    By the way, the info shown by the old UI link is still correct.


    Denis
    Thanks, I did figure it out. BTW still having issues with Defender (usually not) running a scheduled task scan since CU. Four computers configured exactly the same with the same scheduled task and none of them act the same. Was hoping maybe this update would fix it, but doesn't look like it.
      My Computer


  9. Posts : 11,390
    Windows 10 Home x64 Version 21H2 Build 19044.1706
       #9

    My scheduled scans were still working anyway but I did change the path to the new one given in the KB's info page [https://support.microsoft.com/en-us/...lware-platform link given by Brink above]. I think that any old scheduled scans referring to the old path [C:\Program Files\Windows Defender] should still work because none of the updates have deleted that original set of Windows Defender files [they are merely redundant] and the command line switches remain the same.

    Just for info, since the version number is in the path now it might get awkward in the future defining scheduled scans as the version number changes. I have swapped over to using a batch file for my scheduled scans.
    • %LatestVersionPath% will always be the latest version because the /od sort order used in the Dir expression makes the For command process all subfolders in ascending date order so the last one to be set as the variable value is the latest one
    • -Scan -1 are the switches for a quick scan
    • I have this running without incident on 3 Ver 1709 computers [x86 & x64]


    Code:
    set GetLatestVersionPath="dir "C:\ProgramData\Microsoft\Windows Defender\Platform" /ad /od /b"
    FOR /F "tokens=*" %%i IN (' %GetLatestVersionPath% ') Do Set LatestVersionPath=%%i
    "C:\ProgramData\Microsoft\Windows Defender\Platform\%LatestVersionPath%\MpCmdRun.exe" -Scan -1

    Denis
      My Computer


  10. bru
    Posts : 377
    Windows 10 Home
       #10

    Try3 said:
    My scheduled scans were still working anyway but I did change the path to the new one given in the KB's info page [https://support.microsoft.com/en-us/...lware-platform link given by Brink above].
    I am using Task Scheduler where you are introducing code of some sort which is beyond my capabilities. When CU was first launched I saw others report the same issues with Defender and scheduled scans but not so much since. Really can't see why I would be the only one having issues. Like I said I have the exact same task on four different computers but they don't behave the same and certainly don't work properly as they did prior to CU. It is what it is.
      My Computer


 

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