Windows 10: windows defender update fails after 16299.309 update Solved

  1.    17 Mar 2018 #1

    windows defender update fails after 16299.309 update


    my system has updated to 16299.309 ok but i keep getting a failed Windows Defender update error
    it's says it's downloading, then installing, gets to 100% and then throws error message below:

    "
    Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.263.659.0) - Error 0x80070643"

    i tried many fixes including the Trouble Shooter, SFC, resetting download history (batch file from Brink) & ended up reinstalling windows 10 (keeping programs, files & settings) but no fix.
    if i try to update directly from defender i get "error code - 2147023293 ...Fatal error during installation"

    Disk Cleanup of system files is also problematic & doesn't complete on its own.. has to be stopped & restarted numerous times but ultimately seems to delete the required files..

    since i reinstalled windows 10.. do you think it's a setting that was retained from previous install that is stopping it from working? i've wasted hours on this and i've hit the wall.
      My ComputerSystem Spec

  2.    17 Mar 2018 #2

    reinstalling windows 10 (keeping programs, files & settings)

    - presumably you mean you did an in-place upgrade repair install? (Normal boot, run setup.exe from a mounted Win 10 iso or Win 10 bootable medium).

    1. First check your disk:
    Download and run Hard Disk Sentinel (trial) and make sure all disks are reported as good.
    If not, do not continue, and post a screenshot of its GUI.

    2. Now check your file system:

    From an admin command or powershell prompt
    [Windows key + X, click command prompt (admin)]
    chkdsk C: /F
    Your PC will need to restart.
    Post back the result, which you can get after a restart as follows:
    Read Chkdsk Log in Event Viewer in Windows 10 Windows 10 Tutorials
    or
    How to read Event Viewer log for Chkdsk in Windows 10 [Tip] | dotTech
    or
    How do I see the results of a CHKDSK that ran on boot? - Ask Leo!

    If that's all ok, then see this solely on Defender updates:
    FIX: Definition Update for Windows Defender Fails with Error 0x80070643 - Appuals.com
    or
    On Windows Defender Definition Update error 0x80070643 - Microsoft Community
      My ComputerSystem Spec

  3.    4 Weeks Ago #3

    well the problem has fixed itself..
    tried manual updates again today and all went fine.. no errors..
    hope it stays that way..
      My ComputerSystem Spec

  4.    4 Weeks Ago #4

    ...and it's back
      My ComputerSystem Spec


 

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