45Restoring Your Operating SystemThe restore process begins and may takefive or more minutes to complete. A messageappears when the operating system andfactory-installed applications have beenrestored to factory condition.Click9. Finish to reboot the system.Operating System ReinstallationBefore you BeginIf you are considering reinstalling the Windowsoperating system to correct a problem with anewly installed driver, first try using WindowsDevice Driver Rollback. If Device DriverRollback does not resolve the problem, thenuse System Restore to return your operatingsystem to the operating state it was in beforeyou installed the new device driver. See “UsingMicrosoft Windows System Restore”on page 42.NOTICE: Before performing the installation,back up all data files on your primaryhard drive. For conventional hard driveconfigurations, the primary hard drive is thefirst drive detected by the computer.To reinstall Windows, you need the followingDell Operating System• mediaDell Drivers and Utilities• mediaNOTE: TheDell Drivers and Utilities mediacontains drivers that were installed duringthe assembly of the computer. Use theDell Drivers and Utilities media to load anyrequired drivers. Depending on the regionfrom which you ordered your computer, orwhether you requested the media, theDellDrivers and Utilities media andOperatingSystem media may not ship with yourcomputer.