Antimalware Service Executable using a lot of cpu
This process sometimes uses a lot of cpu and makes the system very slow. I think this should never happen on server os.
It's the antimalware part of Defender. There's lots written about this. Like this: I disabled the windows defender via group policies, and now it's off and doesn't bother me anymore.
For anyone who wants to do the same can enable the following group policy:
Computer Configuration > Administrative Templates > Windows Components > Windows Defender > Turn off Windows Defender
Or you might find an answer here: https://antimalwareserviceexecutable.xyz/
Karl Wester-Ebbinghaus (@tweet_alqamar) commented
in Windows 7 it was possible to limit the cpu usage of Windows Defender. Please have a look if this is still the case for your server / Defender. There might exist GPOs for that.