|You should have a selection to disable. Just select disable instead of LAN. Or move it down the list below everything else. |
When you start your computer do you see any text that mentions your RAM and hardware configurations? After that you should get a prompt to hit any key to boot from CD. If you don't get anything like that You may need to hit the spacebar continously.
Or try the single disk icon. I am not familiar with your boot choices. I am guessing either of the first two should be the CD drive.
I suspect you are getting that screen because the BIOS already has tried all the selected boot options and none of them worked.
When you see the CD drive light come on start tapping the spacebar. Failing that you need to read the manual to find out how to boot to the CD drive.