windows - How can I measure my computer temperature?

I would like to monitor the temperature of the computer's components and also the fan speed. How can I do this?

Answer

Speedfan does all that.

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SpeedFan is software that can read temperatures, voltages and fan speeds of computer components. It can change computer fan speeds depending on the temperature of various components. The program can display system variables as a chart and as an indicator in the system tray. Fully configurable user events can be defined to execute specific actions based on system status. As of version 4.37, temperatures in the event section must be specified in °C no matter if the display setting is for °F.

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