Windows 10: Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643

Discus and support Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643 in AntiVirus, Firewalls and System Security to solve the problem; Another person has asked this before but there weren't any useful replies that I found. Anyway, this issue started a few months back when I was getting... Discussion in 'AntiVirus, Firewalls and System Security' started by Kharmela De Guzman, Sep 15, 2022.

  1. KHARMELA DE GUZMAN
    Kharmela De Guzman Win User

    Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643


    Another person has asked this before but there weren't any useful replies that I found. Anyway, this issue started a few months back when I was getting the error code 0x80070643 each time I tried updating the anti-virus on the Windows Defender. Now all I get is Engine Unavailable. I have found lots of suggestions for Windows 10 &11 and tried a few of them, but nothing seems to work. I'm getting really frustrated because all my efforts to try and fix it ends up being futile plus I feel like my laptop is now vulnerable to threats... Can someone help me please... it would be highly appreciate

    :)
     
    Kharmela De Guzman, Sep 15, 2022
    #1
  2. JUANS
    Juans Win User

    Windows Defender Antivirus - KB4052623 4.18.1910.4 - Error 0x80070643

    Hi everyone, I have again the same error 0x80070643 updating windows defender antivirus platform. Now with sfc /scannow and dism i don't found errors. Any suggestions? Thanks
     
    Juans, Sep 15, 2022
    #2
  3. MARSMIMAR
    marsmimar Win User
    Windows Update Error 0x80070643 for Windows Defender

    Still having issues updating Windows Defender as of 4/3/17, 12:30pm CDT on 10 Pro winver 14393.969 . Windows Update shows Error 0x80070643 but manual update via Defender GUI installed latest virus/spyware definition 1.239.713.0. Re-running Window Update shows everything is up to date.

    It's been at least 4 days since this glitch first appeared on my machines. Any thoughts on why Microsoft is delaying a fix? Perhaps to include in next Patch Tuesday 4/11?


    Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643 [​IMG]

    Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643 [​IMG]

    Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643 [​IMG]
     
    marsmimar, Sep 15, 2022
    #3
  4. EESHWAR DAS
    Eeshwar Das Win User

    Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643

    Windows Defender Antivirus Definitions not updating

    An automatic code was generated:

    Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.269.444.0) - Error 0x80070643

    Windows Defender Antivirus not updating successfully.
     
    Eeshwar Das, Sep 15, 2022
    #4
Thema:

Windows Defender Antivirus Update on Windows 11 won't work error code 0x80070643

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