Question: I have a new Samsung 5 series with Windows 8 and I can't make it boot from DVD/USB.I entered BIOS and disabled fast bios mode but when i enter boot priorities the only option i have is Windows boot manager. When I try to enter Windows boot manager, it always restarts.Could anyone please tell me how can I make it boot from DVD?

Answer: 
Apply the following two changes:

* First, you have to turn off *Fast startup* option in *Power Options* menu [1].
* Then you have to enter BIOS [2] and disable *Fast Bios Mode*. I have also changed an option so I can boot not only UEFI operating systems (but I am not sure if it is required).

If you do this, and then save the settings,  

you can change boot priority (`F2` or `F10` while loading the BIOS). 

References:

[1] [EightForums](http://www.eightforums.com/tutorials/6320-fast-startup-turn-off-windows-8-a.html)  

[2] [7Tutorials](http://www.7tutorials.com/how-boot-uefi-bios-any-windows-81-tablet-or-device)  

[3] [Notebook Review Forums](http://forum.notebookreview.com/threads/samsung-series-5-np550p5c-thread.687007/page-5#post-894362)
For Windows 7 installation on the Samsung NP550P5C.
Disable the SAFE BOOT option in the bios first.

After that you will need to convert the drive to a GPT partition using Diskpart on the Windows 7 CD.
Use shift+F10 after CD boot.﻿