I'm having the same problem. I can set the BIOS to legacy and get it to boot from the DVD drive, but once the recovery media starts I receive a message saying the BIOS must be in EUFI mode to begin the recovery process. If I change the BIOS back to EUFI, the system won't boot from the DVD.
Member RevoMaxx is quickly moving up the ranks of Acer Community. He joined us in September and is already making a difference. It's great to see new members like him make a difference only after a few months. Thanks RevoMaxx!