Definition Update for Windows Defender fails

  1.    03 Apr 2017 #1

    Definition Update for Windows Defender fails

    When I run Windows update I am always getting the message below. the Definition number changes as a new definition is released.


    There were problems installing some updates, but we'll try again later. If you keep seeing this and want to search the web or contact support for information, this may help:
    Definition Update for Windows Defender - KB2267602 (Definition 1.239.713.0) - Error 0x80070643
    I started getting the message on Windows 10 AU about 4 days ago. It appears the definitions are being downloaded but the install fails. I decided to install the Windows 10 Creators Update yesterday. I did a clean install. After the initial install I was able to install definitions. However, somewhere along the line it started to fail again. On AU I could update Winders Defender by doing it within Winders Defender itself. Under CU it also fails within Windows Defender, which has been totally revamped, so it looks like no more definition updates for now. It appears I am stuck at KB2267602 (Definition 1.239.603.0)

    Is there a fix for this? Again let me repeat. I had this problem on Windows 10 AU starting about 4 days ago so it's not limited to Windows 10 CU.
      My ComputerSystem Spec

  2. Posts : 32
    Windows 10 Pro 64-bit 1803 17134.345
       03 Apr 2017 #2

    Just to say, I've been experiencing the exact same thing since the latter half of last week.

    (I've tried the Windows Update troubleshooter, but no change).
      My ComputerSystem Spec

  3.    03 Apr 2017 #3

    I found this site that shows you how to update the definitions manually. It did update my defs to the latest version. I think I might have rebooted after I ran the program. Hopefully this fixed the problem but I have my doubts.
      My ComputerSystem Spec

  4. storageman's Avatar
    Posts : 458
    Windows 10 Pro 1803 17134.345
       03 Apr 2017 #4

    There is a thread here -> Windows 10 Update March 31 2017

    which has been discussing this problem.

      My ComputersSystem Spec

  5.    03 Apr 2017 #5

    Thanks. I'll do any posting over there.
      My ComputerSystem Spec

  6. Posts : 382
    windows 10 (x64) Home 1803
       03 Apr 2017 #6

    I also got that error. Now I update from windows defender and then try windows update. Now I don't get error as defender is updated.
      My ComputerSystem Spec

  7. Brink's Avatar
    Posts : 33,812
    64-bit Windows 10 Pro build 18282
       04 Apr 2017 #7

    In addition, :)

    To get your machine back to a protected state, you can manually download and apply the latest Windows Defender definition update by following the instructions outline here:

    Get the latest definitions - Microsoft Malware Protection Center
      My ComputersSystem Spec

  8. Posts : 22
    Windows 10
       04 Apr 2017 #8
      My ComputerSystem Spec


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