Shutting down your computer
When you're done using your computer, it's important to shut it down properly. Depending on your operating system, the exact procedure for shutting down will vary.
To shut down in Windows 8:
Click the Start button to access the Start screen, click the Power button 
near the top-right corner, and selectShut down.
near the top-right corner, and selectShut down.
To shut down in Windows 7 or earlier:
Click the Start button, then select Shut down (in some versions, this may say Turn Off Computer or look like the power symbol ).
).
To shut down in Mac OS X:
Click the Apple icon, then select Shut Down.
