Windows 10: How to disable definition update for Microsoft Defender Antivirus

How to disable definition update for Microsoft Defender Antivirus ? I have another security solution and I disabled Windows Defender Antivirus running Group Policy Editor. I found that the definitions are still updated by Windows Update. Thank you !

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definition update for windows denfender antivirus

Hi mknic,
I have literally just installed the definition update KB2267602 without any problem. I suggest as a first step checking all the Windows Defender settings to make sure they all have the 'green ticks' in each section.






ps. The only reason the 'Family Options' is not ticked is because I am the only user on my computer.

I also would suggest running the 'Troubleshoot' feature in the Update & Security settings which has a section dealing with update problems.

 

Windows Defender Antivirus Definitions not updating

An automatic code was generated:

Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.269.444.0) - Error 0x80070643

Windows Defender Antivirus not updating successfully.

 

Windows defender virus definitions update question

With your Avast installed the real-time Defender protection is disabled, but it should still be available for an on-demand scan and should have kept its definitions updated.

You should see definition updates listed in your Update History....





...and in Reliability History.