Windows 10: Antimalware Service uses 30% CPU while browsing with Firefox

Discus and support Antimalware Service uses 30% CPU while browsing with Firefox in Windows 10 Gaming to solve the problem; Antimalware Process hovers around 30% while opening any webpage in Firefox. No issue with Edge. Added Firefox in Exclusion list to stop this..... Discussion in 'Windows 10 Gaming' started by Karam Lamba, Jan 25, 2023.

  1. Antimalware Service uses 30% CPU while browsing with Firefox


    Antimalware Process hovers around 30% while opening any webpage in Firefox. No issue with Edge. Added Firefox in Exclusion list to stop this..

    :)
     
    Karam Lamba, Jan 25, 2023
    #1

  2. Antimalware service excutable consuming ram and cpu

    Hello,

    We would like to know more about this concern, please provide the following information:

    • Is this your first time to encounter this issue?
    • Did you make any changes to your computer's configuration prior to the issue?
    • What are the troubleshooting steps have you tried so far?
    Antimalware Service Executable is the name of the process MsMpEng (MsMpEng.exe) used by the Windows Defender program. The service associated with this program is the Windows Defender Service. For possible troubleshooting steps, you can check GreginMich's
    post through this link.

    Looking forward to your response.
     
    Antoneth Ber, Jan 25, 2023
    #2
  3. 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...


    --------------------------------------------

    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.

    ________________________________________________________

    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.
     
    Greg Carmack - Windows MVP 2010-20, Jan 25, 2023
    #3
  4. Antimalware Service uses 30% CPU while browsing with Firefox

    High CPU usage by Antimalware Service Executable > Microsoft Defender, when Windows Firewall turned off

    Hello! Dude.

    I'm Allen, once I have also gone through with the same issue " Antimalware Service Executable’ High CPU Issue on Windows 10" as I am also a Windows 10 user, but I get my problem by the simple steps. which I want to share with you.

    Nothing you have to do just follow the simple steps which are mentioned below to resolve your problem: -

    • Disable Windows Defender with the Registry Editor.
    • Change the schedule for Windows Defender
    If you want to know about the resolving process in detail, then kindly visit the site given: -

    Fixed: ‘Antimalware Service Executable’ High CPU Issue on Windows 10
     
    AllenChallam, Jan 25, 2023
    #4
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Antimalware Service uses 30% CPU while browsing with Firefox

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