High background CPU activity after 24H2 update

[Windows 11]

After 24H2 update installation my dell vostro 3500 i7 11th gen laptop shows high background activity for many days, apps loading slowed down. When it's idle, the CPU activity is over 10% most of it due to WMI provider host. How this persisting issue can be solved? Furthermore, I once encountered blank screen after starting the laptop after I installed the update.

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