[Ubuntu] Boot-Repair

[luismorais2]

Hello!

I have my laptop with dual boot (Windows 8.1 and Ubuntu 16.04) and today I managed to upgrade the version of Windows.

The update messed up my GRUB and the menu grub rescue appeared after rebooting.
I used the tool Super Grub2 Disk to boot to Windows, although it did not find any grub files to boot to Ubuntu OS.

After that, I made a Live USB with Ubuntu 16.04 image and tried to run Boot-Repair to restore the GRUB, which was not successful.

Here is the report from Boot-Repair after I tried to repair: http://paste2.org/YwNxMx6D


I would like to ask if somebody is able to help me with this issue.

Thank you very much!

[yancek]

The windows upgrade appears to have re-written the partition table and not included the Ubuntu partition as your fdisk output shows. There is a lot of space between the start of the Extended partition "/dev/sda3 437,202,942" (/dev/sda3) and the start of the swap partition "/dev/sda5 491,802,624"(/dev/sda4) which in all likelihood was your Ubuntu partition. I'm not sure this can be repaired with boot repair but it can be with testdisk. I've seen a number of posts here with this exact problem.

http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step