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.

5.When the DELL logo appears, press <F12> immediately.

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.

6.When the boot device list appears, highlight CD/DVD/CD-RW Drive and press <Enter>.

System Recovery Options

7.Press any key to Boot from CD-ROM. Follow the instructions on the screen to complete the installation.

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Dell MTG24, HW049, A2420 setup guide Click Exit if the Install Windows message appears