If the computer system stops responding or freezes to your commands, you should:

When a computer system becomes unresponsive or freezes, the appropriate action is to restart or reboot the computer. This method is often the most effective way to restore functionality because it allows the operating system to reset itself, clearing temporary files and stopping any processes that may be causing the system to hang.

Restarting the computer gives it a fresh start, which can resolve software glitches or memory overload situations. It also allows the system to properly reload all necessary drivers and applications, often correcting the issue that caused the system to freeze in the first place. This method is generally safe, as it helps prevent potential data loss associated with more abrupt methods such as force shutting down or unplugging the device.

In comparison, force shutdown might seem like a quick solution, but it can lead to data corruption, especially if files are open or processing when the computer turns off abruptly. Unplugging the computer can cause similar issues, not only risking data loss but potentially harming the hardware. Closing the lid, depending on the system settings, may simply put the computer to sleep rather than addressing the underlying issue of the unresponsiveness. Thus, restarting the computer is the most effective and safest choice in this scenario.