64Restoring Your Operating SystemOperating SystemReinstallationBefore 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 Driver Rollbackdoes not resolve the problem, then use SystemRestore to return your operating system to theoperating state it was in before you installedthe new device driver. See “System Restore” onpage 61.CAUTION: Before performing theinstallation, back up all data files on yourprimary hard drive. For conventional harddrive configurations, the primary harddrive is the first drive detected by thecomputer.To reinstall Windows, you need the following:Dell•Operating System discDell•Drivers and Utilities discNOTE: TheDrivers and Utilities disccontains drivers that were installed duringthe assembly of the computer. Use theDellDrivers and Utilities disc to load anyrequired drivers. Depending on the regionfrom which you ordered your computer, orwhether you requested the disc, the DellDrivers and Utilities disc andOperatingSystem disc may not ship with yourcomputer.