CHAPTER 4: INSTALLING AND REPLACING COMPONENTS
Turning Off Your Computer
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your laptop.
1.Save and close all open files and exit all open programs.
2.Click Start 
→ Shut Down.
The laptop turns off after the operating system shutdown process finishes.
3.Ensure that the computer and any attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your operating system, press and hold the power button for at least 8 to 10 seconds until the computer turns off.
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