A year later, and I discover again that I STILL cannot boot from a non-UEFI CD on my UEFI Win 7 Pro SP1 64-bit Dell even though "Enable Legacy ROMs" is ENABLED in the BIOS and Secure Boot is OFF.
Dell - this is your fault. You set what the BIOS can do, and you could have protected our ability to boot from ALL our past CDs.
My original details are here -
http://en.community.dell.com/support-forums/desktop/f/3514/t/19605131?pi21953=1
That thread from a year ago describes the issue but then goes off on a tangent into my (successful) experience in establishing dual-booting, but THIS ISSUE remains. My Dell Optiplex 7010 MT (which is now dual-booting Win 7 Pro SP1 64-bit and Win 10 Pro 64-bit) will NOT BOOT a legacy CD that is not UEFI even though "Enable Legacy ROMs" is CHECKED in the BIOS and Secure Boot is OFF. (My BIOS is A20.)
What is the fix??
Please reply here, not in my old thread above. Thanks.