How to fix high CPU load, constantly at 100%, under Windows 11?

Question

Windows 11 has high CPU usage even though it should be idling. Taskmanager itself will grab 60-70%, and the total use stays at 100%.

What can I do to fix this? (I tried disabling autostart tools, checking the Window installation for integrity).

Answer 1

This did the trick:

PowerCfg /SETACVALUEINDEX SCHEME_CURRENT SUB_PROCESSOR IDLEDISABLE 000
PowerCfg /SETACTIVE SCHEME_CURRENT

Run it from a Powershell with adminstrator priveleges.

Instantly, my CPU isage went down to the expected ~1-3%.