Windows 10: High CPU Usage Not on windows processes but on web browsers!

Discus and support High CPU Usage Not on windows processes but on web browsers! in Windows 10 BSOD Crashes and Debugging to solve the problem; Hi, recently I updated windows 10, after the update, I've been having a problem where whenever I refresh / open a tab / website, the CPU Usage goes... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by AB Falcon, Dec 24, 2021.

  1. AB FALCON
    AB Falcon Win User

    High CPU Usage Not on windows processes but on web browsers!


    Hi, recently I updated windows 10, after the update, I've been having a problem where whenever I refresh / open a tab / website, the CPU Usage goes from under 10% to 70% and then back to normal after the sites have fully loaded it makes it really slow. Does someone know how to fix this and can help me? Merry Christmas!

    :)
     
    AB Falcon, Dec 24, 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, Dec 24, 2021
    #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, Dec 24, 2021
    #3
  4. FREDERIK LONG
    Frederik Long Win User

    High CPU Usage Not on windows processes but on web browsers!

    System Idle Process High cpu usage

    What are the processes that cause HIGH CPU usage?
     
    Frederik Long, Dec 24, 2021
    #4
Thema:

High CPU Usage Not on windows processes but on web browsers!

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