When Microsoft introduced Windows 95, some people thought it was amusing and counterintuitive that the procedure for shutting down the computer began with the "Start" button. In Windows 8, that incongruity is gone along with the Start button, but shutting down with a mouse or touchpad isn’t obvious either. Move the cursor into the top right corner of the screen. A menu will pop out. Sweep down to the "Settings" button that appears, and click it. Then click "Power," then "Shut down." If you're on a touch screen, start by swiping in from the right edge of the screen, then tap "Settings."