Tienes que poner la BIOS en modo Legancy en vez de UEFI.
Para hacer eso le tienes que poner contraseña a la BIOS.
De nada.

El orden de booteo me deja cambiarlo pero, linux esta en una particion y windows en otra pero linux no me da opcion de arrancarlo, windows la particion de donde esta instalado linux windows no la reconoce, windows ni sabe que esta instalado linux ahi, osea ni lo reconoce, en el particionar de discos si me dice que esta ahi, pero nada mas ni me da opcion a arrancar desde ahi ni nada, lo que si puedo hacer es arrancar con un DVD pero tarda lo suyo en arrancar y me seria un coñazo tener que arrancar con el DVD y esperar 30 mins cada vez que quiera hacer algo con linux, gracias y un saludo.

Alternative Naming Options

Some EFI implementations do a poor job of honoring the boot options set via Linux's efibootmgr or other tools. You may also lack access to such utilities, such as if you must install rEFInd in Windows. In such cases, you may need to change the boot loader's name so that the EFI will see it as the default boot loader. rEFInd should then boot when your NVRAM lacks information on specific boot loaders to use. Broadly speaking, there are two alternative names that are most useful:

    EFI/BOOT/bootarch.efi—This name is the official EFI fallback filename. It's most commonly used on bootable removable disks, but it can be used on hard disks. It's typically used only if no NVRAM entry points to a valid boot loader.
    
    EFI/Microsoft/Boot/bootmgfw.efi—This filename has no official special standing in the EFI specification, but as a practical matter, many EFI implementations use it as a fallback boot loader in addition to or instead of EFI/BOOT/bootarch.efi. In fact, some give it such a high precedence that you can't boot anything that's not given this name!

If you need to use one of these names, or something more exotic, you can do so in either of two ways: You can use the mvrefind script to move your installation in one step, or you can move and rename your files manually.