Windows 10: High System CPU usage [BUG]

Discus and support High System CPU usage [BUG] in Windows 10 Ask Insider to solve the problem; [ATTACH] https://preview.redd.it/egg0npenqsq61.png?width=370&format=png&auto=webp&s=492e42277026f54c5584009adcdb0f3c779dbe1f... Discussion in 'Windows 10 Ask Insider' started by /u/awesomelewis2007, Apr 2, 2021.

  1. /U/AWESOMELEWIS2007
    /u/awesomelewis2007 Win User

    High System CPU usage [BUG]

    /u/awesomelewis2007, Apr 2, 2021
    #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, Apr 2, 2021
    #2
  3. RB89
    Rb89 Win User
    High CPU usage with 'system interupts'

    High CPU usage with 'system interrupts'. However, the usage decreases when the task manager is opened. On opening the task manager, the system interrupt is visible for a few seconds and then the CPU usage goes down.
     
    Rb89, Apr 2, 2021
    #3
  4. DEADALOS
    deadalos Win User

    High System CPU usage [BUG]

    "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, Apr 2, 2021
    #4
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High System CPU usage [BUG]

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