I fixed this problem using the solution at http://h30434.www3.hp.com/t5/Desktop-Operating-Systems-Software-Recovery/CD-DVD-DRIVE-NOT-DETECTED-AFTER-UPGRADE-TO-WINDOWS-10/td-p/5172346
Nothing else I...

After pretending this issue didn't exist on my own system, I got cranky & found a solution that worked for me. It involves creating a missing registry key & associated dword. Worked like a charm....