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system using 20-40% of cpu

luizo ' 0 Reputation points
2025-11-04T16:34:31.83+00:00

How do I fix this error where the "system" in task manager CPU usage is stuck at 20-40% when I open Fortnite? Only Fortnite has this error... i try an tutorials in youtube but also not work, I've already tried fixing drivers and other standard settings, but nothing has changed.

Windows for home | Windows 10 | Performance and system failures
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  1. JC 6,705 Reputation points Independent Advisor
    2025-11-04T17:10:30.38+00:00

    Hello,

    You will need to find what is causing cpu usage to go that high, in my experience it’s windows updating in the background while I’m doing something else.

    Other users recommend to perform a clean boot with all services disabled and find what’s causing the issue.

    How to perform a clean boot in Windows - Microsoft Support

    Do a clean boot and see if the problem persists, if the problem isn’t there during a clean boot there may be a service or startup program causing the cpu usage, find it and disable it.

    Hope this helps,

    JC

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