1.    12 Oct 2017 #1
    Join Date : Oct 2017
    Posts : 2
    Windows 10

    Windows Defender Manual Update Error


    When I attempt to do a manual update of Windows Defender definitions I get an error message.

    From the Windows Defender Security Center, clicking "Check for Updates" results in the message shown in the following screen shot:

    Click image for larger version. 

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ID:	157676

    When I attempt manual update from the Windows Defender Antivirus screen by clicking "Update Definitions" I get the following screenshot

    Click image for larger version. 

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Size:	83.4 KB 
ID:	157677

    Interestingly, Windows Defender seems to successfully update itself when left to do so in automatic mode.

    Looking for help finding the source and fix for this issue.

    Many thanks to anyone who can be of help.

    C.
      My ComputerSystem Spec
  2.    12 Oct 2017 #2
    Join Date : Aug 2016
    S/E England
    Posts : 4,476
    10 Home x64 (1709) (10 Pro on 2nd pc)

    I'm not seeing that problem. Apparently a 'buggy' definition update has caused this error in the past. If it continues, this post from @jyim89 (Microsoft Windows Defender Team) may be of help...

    Quote Originally Posted by jyim89
    ...for those running into the definition update error 0x80070643 (or protection definition error: -2147023293)...
    On Windows Defender Definition Update error 0x80070643
      My ComputersSystem Spec
  3.    12 Oct 2017 #3
    Join Date : Oct 2017
    Posts : 2
    Windows 10
    Thread Starter

    I had previously posted about this problem on the "answers.microsoft.com" forum. Jason Yim was one of the responders to that post. I followed his instructions for obtaining Windows logs and sending to him. Have heard nothing more from him for a couple of weeks.

    Don't think this is related to a single definition update because every day or so, it shows a different definition update available but the same error message is displayed for each manual update attempt.

    C.
      My ComputerSystem Spec

 


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