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I managed to install Ubuntu in a sony vaio laptop with Windows 8 pre-installed and updated to Windows 8.1. After I finished the process, I experienced the same behavior than "landroni" (How to fix dual-booting Windows 8 and Ubuntu 14.04 on a Sony Vaio?). However, I do not need to enable External device boot, as he says at the final of his post.

The boot-repair tool generated this url ( I understand that boot-repair tries to modify the boot order in the machine by pointing to GRUB.

In this site (, the author explains how to manually change the bootloader, however, by looking into the report generated by boot-repair, I saw there are three bootmgfw.efi files in three different partitions (sda1, sda2 and sda3). I am afraid to mess things up by chosing the wrong file. Can anyone help?


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