Windows 10: How do I uninstall Microsoft Defender Antivirus Definition updates?

The power went out and came back on, and my laptop has been saying how it cannot determine the ac adapter wattage and type. This happened before when my laptop was updating and shutting down, and the power went out. The same message appeared, and I found out that I just had to uninstall the faulty update, and reinstall it. It went from 0.99 gHz to the normal 2.20 gHz - 2.50 gHz. Now, after the power went out, the same thing happened I think. This has never happened before when nothing unusual happened. My laptop came on normally with no warning message yesterday, and the day that it showed t

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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 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