Service Host: Windows Update - High CPU

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  1. Posts : 2,976
    Windows 11
       #1

    Service Host: Windows Update - High CPU


    Has anyone ever seen this before? I rebooted and it's come back.

    Service Host: Windows Update - High CPU-service-host-windows-update.png
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  2. Posts : 34,923
    Win 10 Pro (1903) (2nd PC is 21H2)
       #2

    - suggests turning off any 3rd party AV somewhere in that
    [SOLVED] - Service Host: Windows Update Using a Lot of Power | Tom's Hardware Forum

    Similar and more here in detail:
    Windows 10 Update process causes high CPU usage [FIX]
      My Computers


  3. Posts : 2,976
    Windows 11
    Thread Starter
       #3

    dalchina said:
    - suggests turning off any 3rd party AV somewhere in that
    [SOLVED] - Service Host: Windows Update Using a Lot of Power | Tom's Hardware Forum

    Similar and more here in detail:
    Windows 10 Update process causes high CPU usage [FIX]
    Working on it thanks.
      My Computer


  4. Posts : 2,976
    Windows 11
    Thread Starter
       #4

    I just right clicked on Service Host: Local Host and selected end task. I was given a message about abandoning data and shutting down. The PC didn't shutdown but the update service stopped and and is no longer there with high CPU usage....

    Does HDD prefetch have something to do with it? I don't think we even have superfetch on current Win 10 versions do we?

    How to Fix High CPU Usage by “Service Host: Local System (Network Restricted)”
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  5. Posts : 34,923
    Win 10 Pro (1903) (2nd PC is 21H2)
       #5

    https://answers.microsoft.com/en-us/...1-dd6b358b7276

    I don't think we even have superfetch
    -> Sysmain service I believe.
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  6. Posts : 2,976
    Windows 11
    Thread Starter
       #6

    dalchina said:
    What would that have to do with the Windows update service?
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  7. Posts : 34,923
    Win 10 Pro (1903) (2nd PC is 21H2)
       #7

    Google -> some useful descriptions e.g.
    https://www.makeuseof.com/tag/what-is-superfetch/
      My Computers


  8. Posts : 2,976
    Windows 11
    Thread Starter
       #8

    dalchina said:
    Google -> some useful descriptions e.g.
    https://www.makeuseof.com/tag/what-is-superfetch/
    Why do think Windows Update service was stuck like that with high CPU?
      My Computer


  9. Posts : 34,923
    Win 10 Pro (1903) (2nd PC is 21H2)
       #9

    I have no idea, sorry.
      My Computers


  10. Posts : 17,664
    Win 10 Home 10.0.19044.1706 (x64) [21H2]
       #10

    Kol12 said:
    Why do think Windows Update service was stuck like that with high CPU?


    Was just reading about OS Armor. My guess would be a setting in that program.
    That's the only abnormal thing I see in your specs.

    We know a working Windows or WD wouldn't block or attempt to block... WU.
    Malwarebytes doesn't try to block WU.
      My Computer


 

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