Fix: Windows Defender Won’t Update – 0x80240016 Error

Ivan Jenic
by Ivan Jenic
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Windows Defender is a very handy feature of Windows which helps you to get rid of unwanted spyware and malware programs.  But we found a little problem when trying to update this feature, namely, an update error 0x80240016 showed up, and the update process stopped.
Windows Defender Won't Update Due a 0x80240016 Error
There are a couple causes of this problem, one of them is the installation of another program. If you’re running an installation of another program while you try to update Windows Defender, it just won’t work. So if you’re installing another program, finish the installation and then try to update Windows Defender. This problem also shows up when Windows Update client can’t access the user token. To solve this, you’ll have to restart your update services, and everything should work.

Microsoft always recommends its Microsoft fix it troubleshooter, and we also have to mention it. So if you don’t want do fix your Windows Defender update problem manually, you can try with fix it. On the other hand, if you want to be your own tech support, here’s what you should do to restart Windows Update service and its components:

Restart Windows Update service

To restart your Windows Update service, you should perform a couple of tweaks in your Command Prompt, and here’s exactly what you should do:

  • Before you restart the Windows Update service, make sure that you closed all Windows Update or Microsoft Update windows
  • Go to Search and type cmd
  • Run cmd as Administrator and type the following lines and press Enter:

net stop wuauserv
net start wuauserv

  • Close Command Prompt windows and try to apply updates again

Manually reset all Windows Update Components

Manually reset Windows Update components

Sometimes reseting just the Windows Update service doesn’t help, but you’ll have to reset all its components. This solution requires a lot of registry editing and some errors could cause serious problems. So before you perform these steps, make sure that you made a backup of your registry. Do manually reset Windows Update components, do the following:

      1. Go to Search and type cmd
      2. Open Command Prompt as Administrator
      3. Disable the BITS service, the Windows Update service, and the Cryptographic service. To do that enter the following lines and hit Enter:
        • net stop bits
        • net stop wuauserv
        • net stop appidsvc
        • net stop cryptsvc
      4. Delete the qmgr*.dat files. To do this, at a command prompt, type the following command, and then press Enter:
        • Del “%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat”
      5. After that, type the following line in the command prompt, and hit Enter:
        • cd /d %windir%\system32
      6. Re-register the BITS files and the Windows Update files. To do this, at a command prompt, type the following commands, and press Enter after typing each command:
        • regsvr32.exe atl.dll
        • regsvr32.exe urlmon.dll
        • regsvr32.exe mshtml.dll
        • regsvr32.exe shdocvw.dll
        • regsvr32.exe browseui.dll
        • regsvr32.exe jscript.dll
        • regsvr32.exe vbscript.dll
        • regsvr32.exe scrrun.dll
        • regsvr32.exe msxml.dll
        • regsvr32.exe msxml3.dll
        • regsvr32.exe msxml6.dll
        • regsvr32.exe actxprxy.dll
        • regsvr32.exe softpub.dll
        • regsvr32.exe wintrust.dll
        • regsvr32.exe dssenh.dll
        • regsvr32.exe rsaenh.dll
        • regsvr32.exe gpkcsp.dll
        • regsvr32.exe sccbase.dll
        • regsvr32.exe slbcsp.dll
        • regsvr32.exe cryptdlg.dll
        • regsvr32.exe oleaut32.dll
        • regsvr32.exe ole32.dll
        • regsvr32.exe shell32.dll
        • regsvr32.exe initpki.dll
        • regsvr32.exe wuapi.dll
        • regsvr32.exe wuaueng.dll
        • regsvr32.exe wuaueng1.dll
        • regsvr32.exe wucltui.dll
        • regsvr32.exe wups.dll
        • regsvr32.exe wups2.dll
        • regsvr32.exe wuweb.dll
        • regsvr32.exe qmgr.dll
        • regsvr32.exe qmgrprxy.dll
        • regsvr32.exe wucltux.dll
        • regsvr32.exe muweb.dll
        • regsvr32.exe wuwebv.dll
      7. Reset Winstock by typing the following command:
        • netsh winsock reset
      8. Now, you’ll have to reset your proxy settings, by adding this line:
        • netsh winhttp reset proxy
      9. Reset the BITS service, the Windows Update service, and the Cryptographic service by adding these commands:
        • net start bits
        • net start wuauserv
        • net start appidsvc
        • net start cryptsvc
      10. Install the latest Windows Update Agent
      11. Restart your PC

That would be all. I hope that this solution helped you, but if you have any additional comments, please write the down in the comments section below.

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