Reinstalling Software 817 Click the checkbox to confirm that you want to continue reformatting thehard drive and restoring the system software to the factory condition, thenclick Next.The restore process begins and may take five or more minutes to complete.A message appears when the operating system and factory-installedapplications have been restored to factory condition.8 Click Finish to reboot the system.Using the Operating System MediaBefore you BeginIf you are considering reinstalling the Windows operating system to correct aproblem with a newly installed driver, first try using Windows Device DriverRollback. See "Using Windows Device Driver Rollback" on page 76. If DeviceDriver Rollback does not resolve the problem, then use System Restore toreturn your operating system to the operating state it was in before youinstalled the new device driver. See "Using Microsoft Windows SystemRestore" on page 78.NOTICE: Before performing the installation, back up all data files on your primaryhard drive. For conventional hard drive configurations, the primary hard drive is thefirst drive detected by the computer.To reinstall Windows, you need the following items:• Dell™ Operating System media• Dell Drivers and Utilities mediaNOTE: The Drivers and Utilities media contains drivers that were installed duringthe assembly of the computer. Use the Drivers and Utilities media to load anyrequired drivers. Depending on the region from which you ordered your computer,or whether you requested the media, the Drivers and Utilities media and OperatingSystem media may not ship with your computer.Reinstalling Windows VistaThe reinstallation process can take 1 to 2 hours to complete. After youreinstall the operating system, you must also reinstall the device drivers, virusprotection program, and other software.