Windows 10: High CPU usage by "System"

Discus and support High CPU usage by "System" in Windows 10 Ask Insider to solve the problem; Hi. I am experiencing this problem - my cpu is running at high percentage and the biggest contributor to that is a "System" process in the task... Discussion in 'Windows 10 Ask Insider' started by /u/Vlatot, Nov 22, 2019.

  1. /U/VLATOT
    /u/Vlatot Win User

    High CPU usage by "System"


    Hi.

    I am experiencing this problem - my cpu is running at high percentage and the biggest contributor to that is a "System" process in the task manager. Goes up to about 40%.

    Is there any way to fix this?

    Thanks

    submitted by /u/Vlatot
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    :)
     
    /u/Vlatot, Nov 22, 2019
    #1
  2. 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, Nov 22, 2019
    #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, Nov 22, 2019
    #3
  4. DENETTEBOYD-KING
    DenetteBoyd-King Win User

    High CPU usage by "System"

    DenetteBoyd-King, Nov 22, 2019
    #4
Thema:

High CPU usage by "System"

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