Windows 10: CPU always 100 due Windows Defender

Discus and support CPU always 100 due Windows Defender in Windows 10 Software and Apps to solve the problem; Hey,I'm recently facing a problem with Windows Defender. A few weeks ago I did a system reset because of a system failure and bsod. I was used to use... Discussion in 'Windows 10 Software and Apps' started by Levi.078, Apr 2, 2022.

  1. Levi.078 Win User

    CPU always 100 due Windows Defender


    Hey,I'm recently facing a problem with Windows Defender. A few weeks ago I did a system reset because of a system failure and bsod. I was used to use Eset Antivirus but now I'm using just Win Defender. Every time I start up my HP Probook 430 G5 my CPU is always at 100%. In the task manager the 'Antimalware Service Executable' task is always the highest. I just want to lower this. I can't do anything on my computer for about a few minutes because my browser is always lagging. How can I fix this?I already searched a lot on the internet and tried a few things, such as: adding Win Defender to the

    :)
     
    Levi.078, Apr 2, 2022
    #1

  2. 100% CPU Usage after Windows 10 upgrade

    Hello Aaron,

    Thank you for posting on Microsoft Community. We regret the inconvenience caused and will assist you in resolving the issue.

    Most of the time, computers only use a small fraction of their CPU power. In fact, many computers use less than 5% of their CPU most of the time. When you open an application, play a video game, or encode media file, the CPU usage will rise or spike temporarily.
    Once the CPU intensive process completes, the CPU usage should once again drop down to lower level. Most applications will not use up more than 50% of your CPU for an extended period of time. However, some programs and system processes can use up a large amount
    of CPU without you even knowing it. This may happen if a program gets stuck in an infinite loop or encounters an unexpected error.

    I suggest you to perform Safe mode and Clean boot procedures on the PC by following the steps below.

    Step 1: I suggest you to boot your PC in Safe mode by following the steps from the link below and check if the issue is resolved.

    Safe mode is a diagnostic mode that starts your computer with limited drivers necessary to run Windows. The words
    Safe Mode appear at the corners of your monitor to identify which Windows mode you are using.

    Expand the options to boot into Safe Mode:

    http://windows.microsoft.com/en-in/windows-10/start-your-pc-in-safe-mode



    Reboot the PC to exit from Safe mode.

    To know more about Safe mode, following is an article on
    Windows Startup Settings (including safe mode)
    (Applies to Windows 10 also):

    http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-safe-mode

    Step 2: If the issue persists, perform Clean boot on your PC by following the steps from the link below and check if the issue is resolved.

    Putting your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue.

    I suggest you to perform clean boot by following the steps from the link below and check if the issue is resolved.

    You can open the system configuration window in Windows 10:

    a. Using run command.

      • Press Windows Key + R keys on the Keyboard.
      • Type msconfig.msc and press Enter.

    b. Using Cortana.

      • Press Windows icon key on the keyboard and type msconfig.
      • Select the top most search result.
    Follow the steps from 3 under How to perform a clean boot
    for Windows 8.1 and Windows 8 from the link below (The steps for clean boot suggested in the link below for
    Windows 8/8.1 is applicable for Windows 10 as well):

    https://support.microsoft.com/en-us/kb/929135

    Disclaimer: Start the computer in normal mode refer the section,
    How to reset the computer to start normally after clean boot troubleshooting
    from the link above.

    Write to us with the status of the issue on the same post for further assistance. Your reply is most important for us to ensure we assist you accordingly.

    Thank you.
     
    Likhitha V, Apr 2, 2022
    #2
  3. Windows defender advanced scan extreme cpu overload

    I routinely do Windows defender advanced scans. Up until about 2 weeks ago, that is.

    All of a sudden the scan was completely maxing out my cpu. I wouldn't say it crashed the computer, but if I tried to do the simplest task while it was running, it rendered the machine unusable due to the draining of resources. Not to mention the scan would disappear, but was still running in the background. The only thing I could do at that point was to wait until it was done scanning, or shut down the unit

    I found this thread that's about a year old, followed some of the suggestions, but nothing really helps.

    I have no problem with the Quick scan.

    High CPU usage when Windows Defender perform a Full Scan in Windows 10 - Microsoft Community

    Windows Defender is my only virus protection, so there is nothing to create a conflict.

    I put my defender installer folders in the excluded list. I changed my power settings from High Performance to Balanced.

    I ran chkdsk /scan, sfc /scannow, dism /online /cleanup-image /restorehealth, and a Memory diagnostic. All normal.

    Finally, I did a fresh install.

    Is anybody else experiencing this?
     
    kitpzyxmsir, Apr 2, 2022
    #3
  4. CPU always 100 due Windows Defender

    100% Cpu


    Cpu: i5-8600

    GPU: RX 580 Series

    RAM: 16.0 GB

    Motherboard: Aorus

    Power supply: Corsair Vengeance LPX 16GB DDR4

    Resolution: 2560 x 1080

    Was working fine not it just crashes my game the game is Tom Clancys Rainbow six siege but I can barely also start up other games
     
    Thomas Underhill, Apr 2, 2022
    #4
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CPU always 100 due Windows Defender

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