102 Removing and Installing PartsTurning Off Your ComputerNOTICE: To avoid losing data, save and close any open files and exit any openprograms before you turn off your computer.Windows® XP:1 Save and close any open files and exit any open programs.2 Click Start→ Turn Off Computer→ Turn off.3 Ensure that the computer and any attached devices are turned off. If yourcomputer and attached devices did not automatically turn off when youshut down your operating system, press and hold the power button for atleast 8 to 10 seconds until the computer turns off.Windows Vista®:1 Save and close any open files and exit any open programs.2 Click Start , click the arrow , and then click Shut Down.The computer turns off after the operating system shutdown process finishes.3 Ensure that the computer and any attached devices are turned off. If yourcomputer and attached devices did not automatically turn off when youshut down your operating system, press and hold the power button for atleast 8 to 10 seconds until the computer turns off.Before Working Inside Your ComputerUse the following safety guidelines to help protect your computer frompotential damage and to help to ensure your own personal safety.CAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.NOTICE: Handle components and cards with care. Do not touch the componentsor contacts on a card. Hold a card by its edges or by its metal mounting bracket.Hold a component such as a processor by its edges, not by its pins.NOTICE: Only a certified service technician should perform repairs on yourcomputer. Damage due to servicing that is not authorized by Dell is not covered byyour warranty.
