Dual boot partition issue

Question

After a failed upgrade to Ubuntu 16.04, I reinstalled from a live CD. I believe this resulted in the creation of another partition duting the reinstall. In addition, I am no longer able to boot my Windows OS and can only boot into 16.04, however I am still able to access files from Windows as well as my initial installation of Ubuntu.

    Device          Start        End    Sectors   Size Type
    /dev/sda1        2048    2050047    2048000  1000M Windows recovery environment
    /dev/sda2     2050048    2582527     532480   260M EFI System
    /dev/sda3     2582528    4630527    2048000  1000M Lenovo boot partition
    /dev/sda4     4630528    4892671     262144   128M Microsoft reserved
    /dev/sda5     4892672 1732583423 1727690752 823.8G Microsoft basic data
    /dev/sda6  1866801152 1919229951   52428800    25G Microsoft basic data
    /dev/sda7  1919229952 1953523711   34293760  16.4G Windows recovery environment
    /dev/sda8  1732583424 1733070847     487424   238M Linux filesystem
    /dev/sda9  1733070848 1737070591    3999744   1.9G Linux swap
    /dev/sda10 1737070592 1737072639       2048     1M BIOS boot
    /dev/sda11 1801070592 1866801151   65730560  31.4G Linux filesystem
    /dev/sda12 1737072640 1801070591   63997952  30.5G Linux filesystem

UPDATE:

I ran an Ubuntu live-CD to use boot-repair. Here is my BootInfo URL

UPDATE #2 After boot-repair, I was able to access Windows using the grub menu. However, I was unable to access my Ubuntu filesystem. Using Disk Manager in Windows, I deleted partitions sd8-12 and extended sd5.

score -1 · Answer 1 · edited Aug 27 '16 at 03:19

That stupid UEFI always spoils everything even on updated machines.
If you want to try more Linux distros please, use legacy MBR mode.

I'm going to tell you how to clean up that mess.
First of all you need to restore the windows boot manager, and please don't upgrade your system unless Windows is your only OS in the machine.

What you'll need:

No more than 5 hours
A device with Windows.iso
A device with Ubuntu.iso

Burn a CD/DVD or use a USB with Rufus for your Windows.iso boot the device, enter to repair > advanced options > command prompt type this:

bootrec /fixboot
bootrec /fixmbr
bootrec /rebuildbcd

That will restore windows and you will be able to access your files (please make a backup of your files with an external HDD and save your windows licence on a paper).
Boot windows and please remove all that ubuntu stuff in the Partition Manager, you will be able to delete all that is not windows.
Then for restore ubuntu insert the ubuntu.iso media and boot as live image, open the terminal(make sure that the name of your HDD typing ´lsblk´ and type this.

sudo grub-install /dev/sda

That's all

Dual boot partition issue

1 Answers1