Booting BIOS, legacy mode. [Solved]

[Paco020295]

First of all, if you would like to help me i suggest you to read http/www.tomshardware.com/answers/id-1916616/problem-booting-changing-uefi-bios-legacy-bios.html

Peterd2012's problem is my fear. I need to boot my pc in legacy mode because i want to boot from a pendrive which has backtrack 5 (Which doesn't support UEFI). I also read that windows 8.1 (My main OS) doesn't boot under legacy. So, my concern is: Will i be able to change it back and forward from UEFI to legacy to boot Backtrack 5 and windows 8.1 whenever i want?

 

[popatim]

Which motherbd do you have?

 

[Paco020295]

Which motherbd do you have?

Intel core i5-4200M CPU @ 2.50Hz

 

[tman1]

That's the processor, not motherboard.

 

[Paco020295]

That's the processor, not motherboard.

Oops, sorry. Right.
http/i58.tinypic.com/359mfk8.png

 

[Paco020295]

http/docs.oracle.com/cd/E23161_01/html/E37044/gnchj.html
Reading this document ("Only devices that support the selected boot mode are listed on the BIOS Boot screen. If you select UEFI boot mode, only boot candidates that support UEFI BIOS boot mode are listed on the BIOS Setup Utility screens in the boot order list. If you select legacy BIOS boot mode, only boot candidates that support legacy BIOS boot mode are listed in the boot order list.")
http/docs.oracle.com/cd/E23161_01/html/E37044/glsem.html#scrolltoc
And this. ("The operating system can only boot with the boot mode property value that was initially set at installation. If you change the boot mode property value after installing the operating system, the operating system will become inoperable (will not boot). To resolve this issue, you must change the boot mode property value back to its initial setting.") I would guess that i can change it back and forth, with no restrictions and no consecuences.