Sorry if I can't write enough here but if you need to escape the restricted boot system you need to learn about Secure Boot and "Corporate Stable Mode." I can't duplicate it all in this post but it has been a lightning attractor from the open source folk.
UEFI is, in my opinion consumer unfriendly. More at http://www.fsf.org/campaigns/secure-boot-vs-restricted-boot
So, I reinstalled windows 8 on my Samsung NP500p4c. There was an issue with windows, and I wanted to use the CD to run a repair, so I made the computer boot from CD. Now windows is repaired, but I can't seem to be able to make it boot from the hard drive again. I need to access the BIOS, or UEFI (Which it originally supported). I tried accessing the UEFI from the advance startup built into windows 8, but the tile is no longer there. So I rebooted the computer and tried to enter BIOS from there (F2 was the onscreen key to enter setup), but despite spamming F2 on both the built in keyboard as well as an external one, it would simply go on to then ask if I want to boot from CD, and if I didn't it just launches windows, and booting from CD takes me to the installation menu for windows 8.
So, in conclusion, I have no idea how to access bios to make it boot form the hard drive again. Any ideas?