64 Advanced Troubleshootingw w w . d e l l . c o m | s u p p o r t . d e l l . c o mReinstalling Microsoft ® Windows ® XPBefore You ReinstallIf you are reinstalling the Windows XP operating system to correct a problem with a newlyinstalled driver, use Windows XP Device Driver Rollback (see page 60) to replace the devicedriver with the previously installed version.If Device Driver Rollback does not resolve the problem, then use System Restore (seepage 61) to return your operating system to the operating state it was in before you installedthe new device driver.Reinstalling Windows XPTo reinstall Windows XP, perform the steps in the following sections in the order in whichthey are listed.The reinstallation process can take 1 to 2 hours to complete. After the reinstallation iscomplete, you need to reinstall the device drivers, virus protection program, and othersoftware.NOTICE: TheOperating System CD provides options for reinstalling Windows XP. The optionscan overwrite files and possibly affect programs installed on your hard drive. Therefore, do notreinstall Windows XP unless instructed to do so by a Dell technical support representative.NOTICE: To prevent conflicts with Windows XP, disable any virus protection software installedon your computer before you reinstall Windows XP. See the documentation that came with thesoftware for instructions.Preparing to Boot From the Operating System CD1 Insert the Operating System CD into the CD or DVD drive.2 Exit any program or utility that might run after you insert the CD.3 Shut down (see page 30) and restart the computer.4 Press immediately after the DELL™ logo appears.If the operating system logo appears, wait until you see the Windows desktop, andthen shut down the computer and try again.5 Use the arrow keys to select CD-ROM and press .6 When the Press any key to boot from CD message appears on the screen, pressany key.