As you probably know, Windows 8 brings with it a new Start Screen and does away with the old Start Menu. The old Start Menu contained the shutdown and restart functions, so those had to be moved elsewhere. Click Read more to see how to access the power functions.
The shutdown and restart functions are now located in the Charms bar. This is activated in many ways. The easiest way is to move your mouse to the bottom right corner of the screen and move the mouse up. If you are using a tablet, simply swipe your finger in from the right edge of the screen. You can also activate the charms bar by pressing Windows+C on your keyboard.
Next, click on Settings. The power options along with the network, volume, brightness, notification, and language settings are present. A quick way to get directly to this page is to press Windows+I on your keyboard. Hint: You can press Windows+I then press the up arrow once to highlight the Power item. Press enter to select it and then use the arrow keys to select what you want to do.
Another quick way of accessing power options is to click either on the taskbar or the desktop and press ALT+F4. This brings up the following screen with power options. This is also available earlier versions of Windows such as 7, Vista, and XP.