Thanks
It worked but not without problems.
I explain:
I entered the bios by pressing f2 in the starting process. Then i had to
disable the secure boot option and change the device too boot the attached
usb.
At this point there was no problem.
But in the instalattion process an error or problem message appear stating
that if i installed the OS it will generate a problem related with the BIOS
are the UEFI or EFI, something like that, i dont remember exactly.
For that reason i opted to cancell the instalattion and it returned me to the
BIOS. In the BIOS there was no option anymore to choose the hard drive or the
pendrive to boot, and i exit the bios it returned me to it right away.
I had no other option that to reatach the pendrive and install Trisquel mini,
despite this problem.
With this OS im seeing the next problems:
Trisquel mini seems to run slower than normal Trisquel now.
Also, when i start the computer the trisquel symbol does not look centered.
I can't enter to the BIOS with f2 again.
Any help would be much apreciated.
Thanks in advance.