Dell Latitude D830 (Early 2007) - Manual (Page 105)

Reinstalling Software
105
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.
4 When the boot device list appears, highlight CD/DVD/CD-RW Drive and press <Enter>.
5 Press any key to select Boot from CD-ROM.
6 Follow the instructions on the screen to complete the installation.