Windows 10: Extremely High CPU Usage - Multiple system processes

Discus and support Extremely High CPU Usage - Multiple system processes in Windows 10 Performance & Maintenance to solve the problem; My Windows Version: Version 1909 (OS Build 18363.592) About 2 weeks ago, I opened a thread on these forums regarding High CPU Usage due to the Service... Discussion in 'Windows 10 Performance & Maintenance' started by Slstar, Jan 31, 2020.

  1. SLSTAR
    Slstar Win User

    Extremely High CPU Usage - Multiple system processes


    My Windows Version: Version 1909 (OS Build 18363.592)

    About 2 weeks ago, I opened a thread on these forums regarding High CPU Usage due to the Service Host: DNS Client system process. To summarize, I was getting up to 100% CPU Usage due to this process and couldn't figure out how to make it go away.

    TairikuOkami recommended I disable DNS Client, after setting my DNS servers manually. This worked at the time and I considered the issue resolved.

    However, after a week later, I still keep getting High CPU usage up to 100% due to several "Service Host" system processes. Sometimes it subsides on it's own, other times I have to play loud music to drown out the jet engine noise.


    Extremely High CPU Usage - Multiple system processes [​IMG]


    What could be wrong this time? How could I fix it?

    :)
     
    Slstar, Jan 31, 2020
    #1
  2. KAPIL ARYA MVP
    Kapil Arya MVP Win User

    system process high cpu usage

    Hello,

    To fix high CPU usage issue, please refer these steps:

    Try to identify the process creating this issue.

    Download Process Explorer from Microsoft:

    Process Explorer - Windows Sysinternals

    Run the tool then select the system process, right-click and select Properties.

    Switch to the Threads tab. This will show which file is using the excessive CPU usage, from which you can then attempt to diagnose it.

    Also refer: [FIX] Windows 10 High CPU Usage Problem

    Let us know if this helps!

    Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.
     
    Kapil Arya MVP, Jan 31, 2020
    #2
  3. DEADALOS
    deadalos Win User
    "System" process with high CPU usage

    I have exactly the same issue (high CPU usage) on a brand new HP ProBook 440 G5 (i7-8550U, pre-installed Win 10 Pro).

    I am pretty sure that there is a problem with audio drivers when the computer wakes up from a sleep mode. I first observed that process flow.exe (audio bloatware provided by HP/Conexant) was consuming (after waking up) ~10–15 % CPU. Here's what I did:

    • I have updated Windows to 1709, build 16229.251 and installed all updates --> Nothing has changed.
    • I have updated BIOS to the latest version provided by HP. --> Nothing has changed.
    • I have run Windows troubleshooting and HP Support Assistant checks --> No problems found, nothing has changed
    • I have manually updated Conexant ISST Audio Drivers (via Device Manager -> Update drivers). Windows installed a newer version. -->
      CPU usage by flow.exe has disappeared, but process called System in thread ACPI.sys+0x21cb0 started consuming ~20 % CPU.
    • I have uninstalled all Conexant software&drivers and manually installed generic High Definition Audio Device drivers provided by Microsoft (Driver Date: 21.02.2018). --> ACPI.sys+0x21cb0 still consumes ~20 % CPU.

    Same issues are discussed in these threads on HP site:


    The result is I cannot use sleep mode (as advised by this post:
    https://h30434.www3.hp.com/t5/Business-Notebooks/ProBook-450-with-high-CPU-usage/m-p/6611446/highlight/true#M149605    ).
     
    deadalos, Jan 31, 2020
    #3
  4. JASONDODD2
    jasondodd2 Win User

    Extremely High CPU Usage - Multiple system processes

    system process high cpu usage

    so i went to task manager and i saw system process has high cpu usage

    and it was after when i connected another monitor
     
    jasondodd2, Jan 31, 2020
    #4
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Extremely High CPU Usage - Multiple system processes

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