1.    03 Apr 2017 #1
    Join Date : Jul 2015
    Posts : 107
    Windows 10 Pro x64

    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.    03 Apr 2017 #2
    Join Date : Aug 2015
    Posts : 32
    Windows 10 Pro 64-bit 1703 15063.540

    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
    Join Date : Jul 2015
    Posts : 107
    Windows 10 Pro x64
    Thread Starter

    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.    03 Apr 2017 #4
    Join Date : Feb 2016
    Phoenix, AZ
    Posts : 242
    Windows 10 Pro 1709 16299.19

    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
    Join Date : Jul 2015
    Posts : 107
    Windows 10 Pro x64
    Thread Starter

    Thanks. I'll do any posting over there.
      My ComputerSystem Spec
  6.    03 Apr 2017 #6
    Join Date : Jun 2015
    Posts : 265
    windows 10 (x64) Home

    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.    04 Apr 2017 #7
    Join Date : Oct 2013
    Posts : 25,174
    64-bit Windows 10 Pro build 17040

    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.    04 Apr 2017 #8
    Join Date : Apr 2017
    Posts : 20
    Windows 10
      My ComputerSystem Spec


Similar Threads
Thread Forum
Definition Update for Windows Defender - KB2267602 fails
I checked my Update history and noticed that the Definition Update for Windows Defender - KB2267602 failed to install. I do not use Windows Defender as I use Norton Security. Windows Defender is grayed out. However, I think that the definitions...
Windows Updates and Activation
how to hide defender definition update notifications?
I am regularly getting notifications to update windows defender virus definitions. I don't want to update regulary. I download new database every 6 months or so, and then merge to it. In w8, in Security and Maintenance, there was a clear...
Windows Updates and Activation
Windows Update hanging on old Windows Defender definition download
When I check the status of Windows Update on my laptop running Win10 x64, it says that updates are available, and that the download is at 98% complete. When I click on details, I can see that KB3105210 is waiting for installation, KB3106932 is...
Windows Updates and Activation
Windows Defender Definition Update
I have disabled Windows Defender in Windows 10, but the Windows Defender Definition Updates are still being downloaded and installed, these updates are wasting my hard disk space. Are there ways to stop downloading of these updates.
AntiVirus, Firewalls and System Security
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 22:02.
Find Us
Twitter Facebook Google+ Ten Forums iOS App Ten Forums Android App

Windows 10 Forums