[HELP] Problem with Windows 8 UEFI I can not boot from CD

Question

On Saturday my parents gave me a laptop (Asus A55A) and brings Windows 8 UEFI've seen it, so I can not boot from CD (for use liveCD of linux distros). I've done everything that has happened to me and what I've found online and can not. What I can do

Answer 1

And if you press ESC at computer startup? In an old asus appeared a menu to choose where you wanted to start. 

 

edit: apparently my PC must also disable security or something (at the end I stopped because installing windows 7 you will lose the partition with the original win8 you probably have in the PC).