Windows 10: Antimalware Service Executable. High CPU usage during Windows update installation

HiDuring install of update KB5009543, Antimalware service exec showed high cpu usage. Is this normal?I then added TiWorker.exe to excluded processes in windows security. The CPU usage for ASE went down. Want to confirm if this is the right thing to do?Thanks.

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Antimalware Service Executable High CPU

I am experiencing high CPU usage on the Antimalware Service Executable on my Surface Pro i7 1 tb (2017). This has been going on for a couple of months. It makes my computer almost unusable. The CPU sits at 100% any time I try to use it. The CPU has
over 50% usage when nothing is being run in the foreground all the time (24 hours a day). The April update was just installed and the Antimalware Service Executable is still running at over 40% of the CPU utilization.

 

Antimalware Service Executable, high cpu, memory and disk usage

I'm having the high CPU usage and it appears that antimalware service executable is to blame. Yes, I had Norton installed and used the removal tool. What do you think could be the problem?

 

Antimalware Service Executable High CPU (30%+)

Hi James. I'm Greg, an installation specialist, 10 years awarded Windows MVP, and Volunteer Moderator, here to help you.

1) When did this start? See if you can System Restore to a point before the problem began following this guide:

https://www.windowscentral.com/how-use-system-r...

System Restore is your first line of defense and can take you back to a point before a problem began. If it doesn't help then you can undo it. Read about it first in the tutorial above and then try restoring to just before this started.

If the problem repeats or System Restore doesn't work then check which Windows Updates were installed at Settings > Update & Security > Windows Updates > Update History, uninstall them there or System Restore again, then immediately check for and block the
Updates with the Hide Updates tool explained here:
https://www.howtogeek.com/223864/how-to-uninsta...

2) 1) See fixes for high CPU usage for anti-malware executable known issue:

https://thewindowscentral.com/msmpeng-exe-high-...

https://www.thewindowsclub.com/antimalware-serv...

https://www.itechtics.com/msmpeng-100-usage-cpu...

https://blog.emsisoft.com/en/28620/antimalware-...

https://whatsabyte.com/windows/fix-antimalware-...

https://geeksadvice.com/how-to-fix-antimalware-...

https://www.makeuseof.com/tag/fix-high-cpu-usag...

https://www.kapilarya.com/fix-windows-10-high-c...

3) Go over this checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get done:

http://answers.microsoft.com/en-US/windows/wiki...

Start with Step 4 to turn off Startup freeloaders which can conflict and cause issues, then Step 7 to check for infection the most thorough way, then step 10 to check for damaged System Files, and also Step 16 to test a new Local Admin account. Then if necessary
continue with the other steps to go over your install most thoroughly.

4) Update your drivers and BIOS/UEFI firmware from PC or motherboard maker's Support Downloads web page, using the full model number, Serial Number or Dell Service Tag on sticker. Compare the latest drivers available for download with the ones presently installed
in Device Manager reached by right clicking the Start button. Make sure you have the latest BIOS or UEFI firmware, Chipset, Display (Video), Sound, USB3, Bluetooth, Network and all other drivers, or else download and install the latest now.

Updating drivers from the Device Manager or Windows Update is rarely enough. The most basic thing we need to learn to maintain a PC is keep the latest manufacturer's drivers installed from their Support Downloads web page.

5) If nothing else works then do a Repair Install, by installing Media Creation Tool, open tool and choose to Upgrade Now. This reinstalls Windows while keeping files, programs and most settings in place, is the most stable method to advance to the latest version,
and solves most problems.
http://windows.microsoft.com/en-US/windows-10/m...

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But remember that in Windows 10 everything depends upon the quality of the install, and Factory or Upgrade installs are inferior installs which most enthusiasts won't even run because they'd expect endless issues. Consider now or later doing the gold standard
Clean Install in this link which compiles the best possible install that will stay that way as long as you stick with the tools and methods given:

http://answers.microsoft.com/en-us/windows/wiki...

There is also an automated Fresh Start that reinstalls WIndows while shedding corrupting factory bloatware, saves your files, but doesn't clear the drive to get it cleanest:

https://www.howtogeek.com/265054/how-to-easily-...

I hope this helps. Feel free to ask back any questions and let us know how it goes. If you'll wait to rate whether my post helped you, I will keep working with you until it's resolved.

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Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly
research any product advertised on the sites before you decide to download and install it.