Windows 10: Windows Security Definition Update Error 0x80070643

So...for several months now, I have been getting an error when trying to update my Windows Defender Antivirus. The Error I get when I check for updates on my computer is: "Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 Version 1.363.1054.0. Download error - 0x80070643." I believe this error initially started when I accidentally shutdown my laptop during an update however in my defense, my computer had no warning signs that it was doing an update at the time. I have since scoured the answers here to errors that match mine and followed what they said. However,

:)

 

Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.259.206.0) - Error 0x80070643

Hi,

Error 0x80070643 is can be caused by Windows update problem. We suggest that you try
to manually install the definitions. Check this
link for the steps. Please go through the section: Manually download and install the definitions.

Feel free to update with the results.

 

Definition Update for Windows Defender - KB2267602 (Definition 1.217.1180.0) - Error 0x80070643

When updating my version of Windows (Windows 10 Pro x64, Version 1511, OS Build 10586.218) in Windows Update I get the following error: Definition Update for Windows Defender - KB2267602 (Definition 1.217.1180.0) - Error 0x80070643 and am asked to retry.

I am using Norton Security Deluxe version 22.6.0.142 with the firewall enabled and windows firewall disabled.

Any suggestions on how to download definition for Defender?

Regards,

 

This update will not run - Definition Update for Windows Defender - KB2267602 (Definition 1.205.298.0) - Error 0x80070643

Hi Christopher,

Thank you for your interest in Windows 10.

I can understand how frustrating it can be when things don’t work as expected. I'd be glad to assist you with this issue.

Please provide us certain information to narrow down the issue:

• What is the make and model of your computer?
• Which security program is installed on your computer?

I would also suggest you to follow the steps from the article below and check if it helps.

.NET Framework update installation error: "0x80070643" or "0x643"

https://support.microsoft.com/kb/976982

Note: The troubleshooting steps in the above links are meant for windows 8, however, you can use the same for windows 10 as well.

For reference: Installation error 0x80070643 or 0x800706d9

http://windows.microsoft.com/en-US/...0070643-or-0x800706d9-enable-windows-firewall

Hope this helps. Post back with result so that we can assist you further.

Thank You.