I firts intalled Trisquel from Windows 10.
In order to do it i followed the next steps:
1) Create the live usb with a program which name i don't remember.
2) Press the shut down option in the windows menu while pressing ctrl.
3) Then, in the bios i think, disable fast boot and secure boot.
4) Again, shut down the computer while pressing ctrl.
5) After that i chosed to boot the computer with the usb that was attached to
it.
Then, the instalattion windows of Trisquel apperead.
In general, it was not a straightforward procedure.
