Hello. I'm having trouble booting my Sony laptop from my CD. I already searched online for answers but they haven't helped. I'm attempting to run a Windows Vista installation disk on my laptop and I need it to boot from that disk. I am not sure how to get that to work though. In my Boot menu, I'm searching for which item to set as first in boot priority. I have no listed CD/ROM option, but I do have internal optical drive. Is that the option I need to use? If so, I already tried that but my laptop will boot to a screen that says "Operating System not found". What can I do?