Explorer.exe constantly consumes CPU around 20% just after recent Windows Update

galvion1 26 Reputation points
2021-01-14T12:08:24.737+00:00

56318-task-manager.jpg

This issue has just started after recent Windows Update yesterday. No running application on my Windows 10. I had never seen it ever. How could I resolve this issue? This issue continues more than 30 hours.

Windows 10 Home
Version: 2004
Installation Date: 2021/01/12
OS Build: 19041.746

Processor: Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz 1.80 GHz
RAM: 8 GB

Sysinternals
Sysinternals
Advanced system utilities to manage, troubleshoot, and diagnose Windows and Linux systems and applications.
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  1. mariora 376 Reputation points
    2021-01-14T15:20:53.507+00:00

    Just t be sure the problem comes from the update, uninstall the latest update and see if it happens again...

    With Process explorer or procmon you can be lucky and find the cause pointing to the process and examine the stacks of the thread in use, but tipically only Microsoft should be able to solve this..

    SO, uninstall the update and confirm the problem is no longer there.
    Reinstall the update and if the problem repro again, report it to Microsoft..

    HTH
    -mario

    1 person found this answer helpful.

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  1. galvion1 26 Reputation points
    2021-01-15T17:29:38.327+00:00

    Hi Mario,

    This issue has been successfully resolved by removing KB4598242. CPU usage of Explorer.exe declined.
    57068-cpu-usage-asof-210116.jpg

    Before removing KB4598242. Explorer still looped.
    57168-kb4598242.jpg

    After removed KB4598242. Explorer doesn't loop.
    57291-new-screenshot.jpg

    Thank you so much for your advice!

    1 person found this answer helpful.
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  2. mariora 376 Reputation points
    2021-01-15T21:56:29.513+00:00

    This is the official thread for your Windows Update:
    https://answers.microsoft.com/en-us/windows/forum/all/cumulative-updates-january-2021/b1de1a41-c428-4dbd-ac38-fb4ab6a7e061

    You can report there your issue and asks for comments. Maybe it is a known issue..

    HTH*
    -mario

    1 person found this answer helpful.

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