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An error with error code 0x8024402c is thrown each time while trying to update Windows Defender's virus & spyware definition.

Checked the following for diagnosis, and found no problem with these;

  1. No pending important updates in Windows Update (automatic update option is checked)
  2. No other antivirus installed
  3. Windows Update Agent is up to date
  4. No proxy server involved

What else do I have to check?


👉 UPDATE

If the chosen answer below doesn't work for you, here's another solution that may work; change your DNS server IP to Google's, see how to do that here.

  • Can you ping fe2.update.microsoft.com successfully? – DavidPostill Jul 3 '15 at 17:23
  • Getting reply successfully on pinging www.fe2.update.microsoft.com – user299244 Jul 3 '15 at 17:28
  • See my answer. Go to the link and click the "Run now" button for Windows 8.1. – DavidPostill Jul 3 '15 at 17:31
  • @DavidPostill okay will do that and get back to you asap – user299244 Jul 3 '15 at 17:42
  • Run windows update from control panel, what error if any do you get? – Moab Jul 3 '15 at 18:11
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Windows defender virus & spyware definition not updating

Run the Microsoft "Fixit" application.

When you use the Windows Update website or the Microsoft Update website to check for and install updates, you may receive one of the errors that are listed in the "Symptoms" section.

Windows 8.1, Windows 8 or Windows 7

The Automatically diagnose and fix common problems with Windows Update troubleshooter may automatically fix the problem described in this article.

There is a link on the page to Microsoft Fixit - the run now button

...

Symptoms

When you use the Windows Update website or the Microsoft Update website to check for and install updates, you may receive one of the following error code in the error messages:

...

0x8024402C -2145107924 WU_E_PT_WINHTTP_NAME_NOT_RESOLVED

...

Cause

These errors may be caused by any of the following issues:

  • Programs or processes that interfere with Internet communications
  • Resource issues on the computer
  • High Internet activity
  • Recoverable database errors

Source Temporary connection-related errors may occur when you use Windows Update or Microsoft Update


Additional troubleshooting steps

If the above doesn't fix your issue, then see How to solve connection problems concerning Windows Update or Microsoft Update.

  • David, post this link also – Moab Jul 3 '15 at 17:32
  • @Moab. Thanks, didn't know about this one. Answer updated. – DavidPostill Jul 3 '15 at 17:34
  • @DavidPostill, It worked the first time after running fixit. Although when I try updating again, it shows the same error – user299244 Jul 3 '15 at 17:59
  • @rps Try the other troubleshooting steps in the other link support.microsoft.com/en-us/kb/818018 – DavidPostill Jul 3 '15 at 18:00
  • Tried that, didn't work 'm afraid. Right now, even after running Fixit it's not working. The Fixit although keeps fixing the issue Windows Update error 0x80070057 every time I run it. – user299244 Jul 3 '15 at 18:14

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