Hi Shadowjump, The optical drive has to be added manually in the F12 menu. You may try the following steps: Hope this helps.
Hi, I am trying to install Windows 7 64-bit on my brand new Inspiron 3521 and for the life of me I cant!  Here is what I did:  Changed boot mode to Legacy mode, booted from DVD, setup loads, but cant install, cause disk is GPT So, I read that I have to boot from UEFI to install Windows 7 in a GPT drive.  When I select UEFI and select boot device, there is only the option to boot from the HDD (Recovery Partition).  There is no DVD option at all!! How can I install Windows 7 in a GPT drive  if I cannot select the DVD Drive as a boot device????
UEFI Boot, no DVD Drive available to select from!!