Windows 10: antimalware uses all cpu usage then crashes pc

Discus and support antimalware uses all cpu usage then crashes pc in Windows 10 Software and Apps to solve the problem; fresh install of windows 10 pro 64biton start-up all processes boot as normal then roughly 4 minutes in then crashesshutdown all back round programs... Discussion in 'Windows 10 Software and Apps' started by bazilton, Oct 1, 2023.

  1. BAZILTON
    bazilton Win User

    antimalware uses all cpu usage then crashes pc


    fresh install of windows 10 pro 64biton start-up all processes boot as normal then roughly 4 minutes in then crashesshutdown all back round programs i-cue and razor synapse launched task manager and antimalware was using 88% and upwards of CPUhave now turned off all windows defender processes and seems to have fixed but don't want to leave it turned off

    :)
     
    bazilton, Oct 1, 2023
    #1
  2. GREG CARMACK
    Greg Carmack Win User

    Antimalware Service uses 30% CPU while browsing with Firefox

    Hello Karam, I'm Greg, here to help you with this.

    Both high Anti-Malware CPU usage and high CPU usage on Firefox are usually solved by one of these:

    https://browserhow.com/how-to-fix-high-cpu-usag...

    https://superuser.com/questions/1320346/firefox...

    https://windowsreport.com/antimalware-service-e...

    (Avoid ad links which intrude into editorial copy, especially DO NOT INSTALL Restoro, PC Repair Tool and Reimage ads)

    https://softwarekeep.com/help-center/how-to-fix...

    https://support.mozilla.org/en-US/kb/firefox-us...



    Hopefully one of those will fix it. If not the latest Firefox download is here:

    Download the fastest Firefox ever

    Clean Install Firefox: How to Install or Uninstall the Mozilla Firefox Browser

    Feel free to ask back any questions. Based on the detailed results you post back, I will have other suggestions if necessary.

    ______________________________________________

    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, Oct 1, 2023
    #2
  3. CONFOOSEDDESI89
    confooseddesi89 Win User
    High CPU usage by Antimalware Service Executable > Microsoft Defender, when Windows Firewall turned off

    Hello,

    I am using a Windows 10 Pro edition, 64-bit, version 20H2, OS build 19042.1466, on an HP ENVY 17 laptop, processor Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz 2.30 GHz, 32.0 GB RAM. I became aware of high CPU usage for "Antimalware Service Executable > Microsoft Defender Antivirus Service" (from 40-70% of CPU usage at any given time). I read online this could be fixed by turning off Windows Defender (I have other anti-virus software installed). However, even with Windows Defender turned off, "Antimalware Service Executable > Microsoft Defender Antivirus Service" remains listed on Task Manager, at 43.5% CPU. I believe this is significantly slowing my PC down - combined CPU usage is now 97-99%. Any assistance is appreciated. Thanks.
     
    confooseddesi89, Oct 1, 2023
    #3
  4. AMRSH
    Amrsh Win User

    antimalware uses all cpu usage then crashes pc

    Antimalware service executable using lot of memory and cpu.

    Hi Muraleedharan,

    I'm Amr, an independent advisor.

    Antimalware Service Executable is one of the background-running services in Windows Defender. Antimalware Service Executable is running to scan the malware and spyware when you access them.

    It will detect if there’s anything harmful on your PC Aside from that, it also takes a background scan of your system for any viruses or worms. Its scanning relies heavily on your computer’s CPU, that’s why you find it’s eating the CPU usage on your Windows. To get this sorted, I suggest to follow the steps below:

    Method 1: Change Windows Defender’s schedule

    The error is mainly due to its real-time protection feature. Kindly follow the steps to change Windows Defender’s schedule to fix it.

    On your keyboard, press the Windows logo key and R at the same time to invoke the Run box. Type taskschd.msc and press Enter.

    Double-click on Task Scheduler Library > Microsoft > Windows.

    Double-click Windows Defender in Windows. Then double-click Windows Defender Scheduled Scan.

    Uncheck Run with highest privileges.

    Uncheck all the items in the Conditions section. Then click OK.

    Method 2: Add Antimalware Service Executable to Windows Defender exclusion list

    On your keyboard, press the Windows logo key and I at the same time to open the Settings window.

    Click Update & security.

    Click Windows Defender. Then click Add an exclusion in Exclusions.

    Click Exclude a .exe, .com or .scr process

    Type MsMpEng.exe. Then click OK.

    Restart your PC and see if the issue persists.

    I hope this is helpful. If you require any additional assistance, don't hesitate to respond to this.

    This is a user-to-user support forum. We're users just like you helping other users to find solutions to their problems.

    Best Regard

    Amr
     
    Amrsh, Oct 1, 2023
    #4
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