To turn off a Windows 7 machine you should?

To turn off a Windows 7 machine, click on the "Start" button in the bottom left corner of the screen. Then, select the "Shut down" option from the menu. If you want to restart the computer instead, you can choose "Restart" from the same menu. Alternatively, you can press "Ctrl + Alt + Delete" and select the power icon to access the shutdown options.