After upgrading win10, the fan is ringing, the fan is rotating at a high power. The solution is

. After upgrading Win10, the fan always turns around. At this time, you can consider changing the system cooling method. In the system default state, the heat dissipation mode is “active”, which means that the fan speed is increased when the heat is relatively large, and the fan speed is increased before the processor speed is reduced.
If your computer fan continues to spin at high speed, consider changing it to “passive”, meaning “to reduce processor speed before increasing fan speed” to reduce heat generation. Of course, this will have an impact on system performance, and we need to make some trade-offs.
This setting option is also available in Win7 and Win8.1 systems.
Steps to change the cooling method of the system:
Open the control panel — find the power option, click on the selected power plan and click "Change the plan settings";;

Click “Change advanced power settings ”;

Change the system cooling method to "passive" here, OK~