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. To clean a disc, wipe it from the center outwards (not in a circle) with a clean, dry cloth. If necessary, moisten the cloth with water or a neutral cleaner (not benzine or rubbing alcohol). Let the disc dry completely before inserting it in the drive. Powering down the computer NOTE Pushing the power button before shutting down the Windows® operating system could cause you to lose your work. Make sure the system indicator panel’s disk light and the drive-inuse light are off. If you turn off the power while a disk is being accessed, you may lose data or damage the disk and/or drive. When you power down the computer, you have a number of options to choose from: . Turn Off or Shut down, which power off the computer . Hibernation, which saves the current operating state to the hard disk and powers off the computer . Standby, which saves the current operating state to memory and enters a low power mode . Restart, which restarts the computer Learning the Basics Learning the Basics Powering down the computer Each option has its advantages. TECHNICAL NOTES: Before using any of these options to power down your computer, save your files and make sure the disk activity lights are off. If you change your mind and decide to continue working after all, wait a few seconds before turning the computer on again. Turn Off or Shut down command The Turn Off or Shut down commands power off the computer. The Windows® XP Home operating system uses the Turn Off command. The Windows® XP Professional operating system uses the Turn Off command if you are not connected to a Windows® domain server. The Windows® XP Professional operating system uses the Shut down command if you are a member of a domain. Factors to consider when choosing Turn Off or Shut down: . No power is used while the computer is turned off. This is the most efficient mode if you will be away from your computer for an extended time. . Restarting from Turn Off or Shut down uses the most time and battery power. . When starting up again, the system does not automatically open the programs and files you were previously using. Learning the Basics Learning the Basics Powering down the computer Restart command Restart is the same as Turn Off or Shut down but automatically powers up the computer. Use it when you need to reload the operating system, for example to activate changes to system settings. Hibernation command The Hibernation command shuts the computer down completely, but it first saves the current state of the computer to the hard disk. Since Hibernation mode does not require power to maintain the saved information, the system settings are retained indefinitely. Restoring information from the hard disk takes longer than restoring it from memory. When you start up again, the computer runs a self-test, loads the operating system, and then returns to the state in which you left it. Factors when choosing Hibernation mode: . While in Hibernatio...

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