If you want to install operating system through bootable
operating system CD/DVD and you are not able to make any changes in BIOS like changing
the first boot sequence to CD/DVD drive, then you have to first clear or reset
the BIOS settings to factory default and make any changes you desire.
Switch of the computer. Open the CPU cabinet and look for
the battery placed on the motherboard.
Remove the battery
and switch on the computer. Now you should be able to see " CMOS ERROR " press
F2 or F10 or DEL
to enter BIOS. The error message varies depending on the manufacturers of the
motherboard and BIOS. Switch off the computer now and put the battery back to
motherboard and switch on the computer and press F2 or F10 or DEL to enter BIOS depending on your BIOS
manufacturers. You should now be able to make any changes to BIOS. Remember, any
changes made to the BIOS will not be saved if there is no battery placed on the