Dell OptiPlex 755 - Manual (Page 219)

8. Click Finish to reboot the computer.
Using the Operating System Media
Before you Begin
If you are considering reinstalling the Windows operating system to correct a problem with a newly installed driver, first try using Windows Device Driver
Rollback. See
Using Windows Device Driver Rollback . If Device Driver Rollback does not resolve the problem, then use System Restore to return your operating
system to the operating state it was in before you installed the new device driver. See Using Microsoft Windows System Restore .
To reinstall Windows , you need the following items:
l Dell™ Operating System media
l Dell Drivers and Utilities media
Reinstalling Windows XP or Windows Vista
The reinstallation process can take 1 to 2 hours to complete. After you reinstall the operating system, you must also reinstall the device drivers, virus
protection program, and other software.
1. Save and close any open files and exit any open programs.
2. Insert the Operating System disc.
3. Click Exit if the Install Windows message appears.
4. Restart the computer.
When the DELL logo appears, press immediately.
5. When the boot device list appears, highlight CD/DVD/CD-RW Drive and press .
6. Press any key to Boot from CD-ROM.
7. Follow the instructions on the screen to complete the installation.
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NOTICE: Before performing the installation, back up all data files on your primary hard drive. For conventional hard drive configurations, the primary
hard drive is the first drive detected by the computer.
NOTE: The Dell Drivers and Utilities media contains drivers that were installed during the assembly of the computer. Use the Dell Drivers and Utilities
media to load any required drivers. Depending on the region from which you ordered your computer, or whether you requested the media, the Dell
Drivers and Utilities media and Operating System media may not ship with your computer.
NOTICE: The Operating System media provides options for reinstalling Windows XP. The options can overwrite files and possibly affect programs that
are installed on your hard drive. Therefore, do not reinstall Windows XP unless a Dell technical support representative instructs you to do so.
NOTE: If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft® Windows® desktop; then, shut
down your computer and try again.
NOTE: The next steps change the boot sequence for one time only. On the next start-up, the computer boots according to the devices specified in
the system setup program.