1. Setting up AMI BIOS
AMI BIOS usually requires you to press DEL key to enter setup
Choose the BOOT menu and set Boot Device Priority option: set first boot device to CDROM and second boot device to HARD DRIVE. Now you can press F10 to save settings.
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2. Setting up Award BIOS
On Award Bios you will see something like this screen. Press a key required to enter BIOS setup:
Now choose Advanced Bios Features
and set First Boot Device to CDROM and Second or third to HDD-0 and Press F10 to save it.
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3. Setting up Dell BIOS
On some Dell Systems you can enter BIOS by pressing F2
Now choose Boot Sequence and then assign CD-ROM to first position by pressing – and + and press space to enable it (when enabled, it is marked by asterisk *). Press ESC and choose "save settings and exit". On some Dell Systems you can press F12 to boot from CD one time.
4. Setting up Phoenix BIOS
Press F2 to enter BIOS setup:
and set Boot Sequence to A,CDROM,C. Then press Esc and F10 to save it.