•In Windows® 7:
Click Start 
, then click Shut Down.
•In Windows Vista®:
Click Start 
, then click the arrow in the
•In Windows® XP:
Click Start →Turn Off Computer →Turn Off.
The computer turns off after the operating system shutdown process is complete.
2.Ensure that the computer and all 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 about four seconds to turn them off.
After Working Inside Your Computer
After you complete any replacement procedure, ensure you connect any external devices, cards, and cables before turning on your computer.
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell computers.
1.Connect any external devices, such as a port replicator, battery slice, or media base, and replace any cards, such as an ExpressCard.
2.Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer.
3.Replace the battery.
4.Connect your computer and all attached devices to their electrical outlets.
5.Turn on your computer.