Despite standing on my head, praying backwards and doing nasty things to chickens and goats, I cannot boot from my CD-DVD drive even after I turn OFF Secure Boot and UEFI. Then, yes, my machine DOES list my CD-DVD as a boot option, but when I actually try to boot from the CD-DVD, I get an error message.
(Optiplex 7010 Mini-Tower with Win 8 Pro 64-bit, 8 GB RAM, 500 GB hard drive and an Intel i5 3470 processor. It has BIOS version A16.)
I have a good, detailed thread on this issue in Desktop Hardware Forum:
http://en.community.dell.com/support-forums/desktop/f/3514/t/19605131
Please GO OVER THERE for technical details and let me have your thoughts. Many thanks!