Windows 10 or 8 System Interrupts causing high CPU usage

I had a few laptops where the system interrupt process was consuming 10-15% CPU. The one thing that seemed to have worked was disabling ‘turn on fast startup’ in the power settings.

Hit your start button and type power options and click on the power options.
Left side, ‘chose what the power buttons do’ click on that.
At the top of this page, click ‘Change settings that are currently unavailable’
Scroll to teh bottom, and uncheck ‘Turn on fast startup (recommended) and click save.
You can reboot, but this should solve the problem.

IF not, you might have a bad driver and need to try disabling hardware until you see the issue go away, and then work on updating that driver.

power

UPDATE:

I also found that disabling hibernation will remove this option completely. You can do this via CMD or POWERSHELL:

POWERSHELL:
powershell -Command "Start-Process 'powercfg.exe' -Verb runAs -ArgumentList '/h off'"

COMMAND PROMPT:
powercfg -h off

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