It should be reminded that modifying this value will affect Cortana's performance, which is one of the possible reasons for high CPU utilization. You can refer to this method if you don't use Cortana.
Another reason for occupying CPU may be P2P sharing service for background update. You can choose to turn off P2P sharing. Method: Open System Settings-Update and Security-Windows Update-Advanced Options-Choose how to provide updates, just turn off "Update in Multiple Locations".
If you are using Win 10 Home Edition system and the Windows Spotlight function is turned on, it may be that the background service of this function leads to excessive CPU usage. Open the system settings-personalization-screen lock interface and select other background modes.
Windows prompt function may also lead to high CPU usage. This function will push some notifications about system functions according to the user's operating habits. If you are already familiar with Win 10, you can turn it off. Open System Settings-System-Notifications and Operations, and close "Show Tips about Windows".
After deep acceleration with 360 security guards or Tencent housekeeper, slim down the system disk!