How do I turn off "Antimalware Service Executable"?

It's using memory, disk and CPU power for days now and it's making my computer run very slow.

Even opening the Explorer takes about 15 seconds.

What can I do about it?

Here is an image from the task manager:

 

Question Info


Last updated November 15, 2019 Views 9,295 Applies to:
Probably a Scheduled scan is a reason why it is taking up so much resoruces. GR
GreginMich's excellent reply here should help:
https://answers.microsoft.com/en-us/protect/for...
Sumit

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This has been going on for about 3-4 days straight now. Why would a scheduled scan take so long?

I've read in many threads to install a third party AV but if that is the solution to have a smooth running PC then why the heck does Windows Defender even exist..

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At least. try disabling scheduled scan and see if it fixes it.
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Sumit

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Hi Pi77Bull,

Most likely, Defender is caught in a loop . . .

Open Windows Defender, go to Scan - Offline Scan

Running that scan should clear the loop from Defender!
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This didn't fix it :(

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W+R
TYPE IN CMD.EXE

ENTER IN
SFC/SCANNOW

IT'S A GOOD IDEA IF YOU RAN IT THREE TIMES AND THEN REBOOT.

THIS SHOULD CLEAR IT UP... THIS IS WHAT I'VE BEEN ADVISING OTHERS WHEN WIN DEF GOES INTO A LOOP

HOPE THIS HELPS!

MARK THIS POST AS ANSWER IF IT WORKS!

"It's deja vu all over again" - Yogi Berra

Please vote if my answer was helpful - Thanks!

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I tried "sfc /scannow" in an elevated command prompt but it didn't even start the scan.

I added a key to the registry to turn off "Antimalware Service Executable", restarted and tried the command again.

The scan started and it found some damaged files and restored them. After running the command two times again I removed the registry key that I added erlier and restarted my PC. It didn't work.

I'm considering reinstalling Windows (although this is pretty much a new machine with a fresh Windows installation).

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maybe you can check firefox's issue......

https://news.softpedia.com/news/how-to-fix-high-windows-defender-disk-activity-when-using-mozilla-firefox-521796.shtml

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Thanks for answer, unfortunately the steps on that site didn't fix the problem :(

I also tried uninstalling Firefox and clearing the temp folder, didn't work either.

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