First, the way to enter the BIOS according to the type of BIOS is also different, the most commonly used is the boot has been holding down the "Del" key to enter the BIOS, the interface is mostly the following figure:
Mobile ↑↓←→ cursor keys can be selected, the general set up the boot sequence of items in the "Advanced BIOS Features" This option (right figure red box).
The following screen appears when you enter:
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In the box above, four are the first, second, third, and other starting order, if you set the optical drive for the first boot sequence, you can move the cursor to the "Primary boot Drive", and then enter, with the ↑↓ cursor select "CDROM", and then enter to determine.
Press F10 to save, then press ESC to exit (may be prompted to disk, press "Y" to exit on the line.) )
Second, there is a press "Del" into the BIOS interface as follows:
This kind of BIOS interface is relatively older, but also very common, setting from the CD-ROM boot can choose "BIOS FEATURES SETUP" and return, in the next interface select "Boot Sequence", with ↑↓ cursor keys will be adjusted to "cdrom,c,a
Press F10 to save the exit.
To set the CD-ROM drive boot, move the selection menu to the Boot menu, as shown below:
Select "Boot Device Priority" in the figure above and enter the boot order adjustment and adjust to the CD drive boot
When the settings are complete, press the "F10" key to save.