Windows 10: Windows Defender not updating to the latest definitions.

Bit of a strange one here, for the past 3 days I have not been unable to update to the latest definitions whether it be through Windows Update, Windows Defender, manual updates or through using a command prompt.


The latest definition I had was 1.271.815.0 on 11th July.


After using a command prompt I removed all prior definitions and it automatically updated to 1.271.760.0 from 10th July,


Attempts to since update this to the latest definitions have thrown up the usual error messages,


Windows Defender says protection updates are "up to date".


I have a Surface Pro 4 with Windows 10 version 1703.


Thanks!

:)

 

Definition Update for Windows Defender - KB2267602 (Definition 1.225.3124.0) - Error 0x80070643

Hello,

With the issue description, I understand that you are getting the error code for Windows Defender Error 0x80070643. I will certainly help you.

KB2267602 is the latest Definition update for Windows Defender. I would suggest you to follow the suggestion as a workaround given by
johnhawk88 replied on 24, 2015 and check if it helps.

Definition Update for Windows Defender - Error 0x80070643

If issue persists you may try the steps given below and check if it helps.

Method 1: Windows Update troubleshooter.

Run the Windows Update troubleshooter to try and fix the issue. Refer to the link to run the troubleshooter:

I request you to run the Windows Update Troubleshooter and check it helps.

• I search bar Type Troubleshooter and click on
  Troubleshooting;
• Click on the Find and Fix problems tile and then click on the
  view all button the left pane.
• Click on the Windows update
  troubleshooter and run it.

Method 2: Reset Windows Update components
and test the issue.

I suggest you to reset Windows Updates Components. Resetting Windows Update Components and the Windows Update files helps to fix Windows Update errors.

http://support.microsoft.com/kb/971058

Disclaimer: Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow
these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Backup the registry:
http://support.microsoft.com/kb/322756/en-us

Note: To reset the computer to normal mode after troubleshooting, please refer to “How to reset the computer to start as usual”
from the above article.



If the issue persists, I would suggest you to manually download the latest definition updates for Windows Defender.



How to manually download the latest definition updates for Windows Defender

http://support.microsoft.com/kb/923159

Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.

 

Windows Defender Definition Updates.

Thank you Elba for the prompt reply. However, there is a problem: In "Control Panel" under the "Programs and Features" page > "View Installed Updates" the " Windows Defender Definition Updates" are NOT listed. Consequently, I cannot delete/uninstall them.
The same thing happens when I use "Settings" >" Updates & Security" > "View Update History". Here the Definition Updates are all listed but I can't uninstall them either. Any other suggestions?

Thanks again, Fred

 

windows defender detected error0X8050800c

Hello,



This error indicates that there might be a problem with your security product. We suggest that you follow these steps to update the definitions on your Windows Defender:

• Update the definitions. Either click the Update definitions button on the Update tab in Windows Defender, or download the latest definitions from the Microsoft
  Malware Protection Center.
• Run a full scan.
• Restart the device and try again.

If you need further assistance, don’t hesitate to reply on this post.