Windows 10: how do I fix windows Defender engine unavailable in windows 10

how do I fix windows Defender engine unavailable in windows 10

:)

 

Windows defender-not updating-Engine unavailable  

@Try3

Thank you for your quick response. You have always been quick to respond.

This morning I updated the HP laptop to 21H2 through the normal Windows update. Do you still think I should do a repair install with 21H2 ISO?

I am posting three screenshots .













I am yet to try the suggestion made by @hdmi in his post #8

"See also options 2 and 3 in this tutorial:
Windows Defender not updating automatically in Windows 11/10"

I shall try it later tonight and report to hdmi. He must be waiting in the wings.

 

Windows defender-not updating-Engine unavailable  

He has not been doing a Repair install ever since post #2 so he is unlikely to bother now.
#2
#5
#7
#15
#26
#33
and now #36


All the best,
Denis

 

Windows defender-not updating-Engine unavailable  

Option 2: Run the Windows update trouble shooter : Trouleshooter couldn't identify the problem.
The report:





Option 3: Trigger Microsoft Defender using Command line: Failed





When I closely looked at the Security Intelligence updates I observed that the update was downloaded, While installing it the progress indicator jumped from 0 to 33% , remained there for sometime and then jumped to 66% remained at it for sometime and then jumped to 100% but before you can even see it, the the error message pops in.. So I believe the install was also complete but it did not find the engine to attach to, Engine unavailable.
The error message:





Sometimes it is 0x80070643 and sometimes it 0x 80070005.