Windows 10: Update Fails Windows and Defender Solved

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  1.    10 Aug 2015 #1

    Update Fails Windows and Defender


    Since yesterday i keep getting this error.

    Any ideas how to fix this?

    Click image for larger version. 

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      My ComputerSystem Spec


  2. Posts : 14,568
    Win 7 32, Win 7 64 Pro, Win 8.1 64 Pro, Win 10 64 Education Edition
       11 Aug 2015 #2

    See this post for info on the problem.

    Error Codet install - Microsoft Community

    In the past I had Defender not update a couple times. I solved it by d/l ing the definitions manually & installing them. In both instances after doing this, my updates started working again.

    You may also wish to run a SFC to see if anything need repaired.

    https://support.microsoft.com/en-us/kb/923159

    https://www.tenforums.com/tutorials/2...dows-10-a.html

      My ComputerSystem Spec

  3.    26 Oct 2016 #3

    FIX: I was able to fix this by opening CMD as Admin and typing (with quotes):


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All


    Then I typed (with quotes:


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate


    Hope this helped!
      My ComputerSystem Spec


  4. Posts : 1
    Windows 10 Pro 1607
       26 Oct 2016 #4

    Bingo!


    colsearle said: View Post
    FIX: I was able to fix this by opening CMD as Admin and typing (with quotes):


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All


    Then I typed (with quotes:


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate


    Hope this helped!
    This worked like a charm. Thank you.
      My ComputerSystem Spec

  5.    26 Oct 2016 #5

    I've been chasing that one all day !
      My ComputerSystem Spec


  6. Posts : 1
    Windows 8.1 Update 3 Enterprise x64 EN
       26 Oct 2016 #6

    colsearle said: View Post
    FIX: I was able to fix this by opening CMD as Admin and typing (with quotes):


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All


    Then I typed (with quotes:


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate


    Hope this helped!
    Yes. This actually works, thanks a lot.
      My ComputerSystem Spec

  7.    27 Oct 2016 #7

    Doesn't work!
      My ComputerSystem Spec

  8.    27 Oct 2016 #8

    colsearle said: View Post
    FIX: I was able to fix this by opening CMD as Admin and typing (with quotes):


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All


    Then I typed (with quotes:


    "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate


    Hope this helped!
    Helped me out
    The update still showed in Windows Update but hitting retry cleared it.
      My ComputerSystem Spec

  9.    28 Oct 2016 #9

    I have posted the fix on many Microsoft forums but all have been deleted. Why would they delete the fix ?

    Worrying
      My ComputerSystem Spec

  10.    28 Oct 2016 #10

    I had this problem on a Win 10 Home based computer. Cannot disable Defender.

    Deleted all files in C:\Windows\SoftwareDistribution\Download, and retried update, but the problem were still there. Clicked on Try Again, and Voila!
      My ComputerSystem Spec


 
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