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I have installed Window 7 on Ubuntu 14.04.1 pre installed Laptop. Then Windows written GRUB with it's own BOOTLOADER. Now it's only booting Windows 7. I have done these.. Booted in live mode(try mode). Then sudo mount /dev/sda2 /mnt(My Ubuntu partition),Then sudo chroot /mnt Then grub-install /dev/sda, Which was a successful grub installation, Then update-grub. Successfully detected all bootloader including Windows 7(Loader), But when I rebooted it's again going straight to Windows 7. What to do ?

Purnendu Nath
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2 Answers2

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I love boot repair but ONLY as a live CD. The one and only time I ever installed it on an installation intending to fix that installation, it rendered the installation completely unbootable, so I beg you, please do not install boot repair on the drive you are trying to fix. Always run boot repair from a live booting boot repair cd or self booting usb flash drive.

gyropyge
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Pulled from here
2nd option : install Boot-Repair in Ubuntu

  • either from an Ubuntu live-session (boot your computer on a Ubuntu live-CD or live-USB then choose "Try Ubuntu") or from your installed Ubuntu session (if you can access it)

  • connect to the Internet

  • open a new Terminal, then type the following commands (press Enter after each line):

For Ubuntu 12.04

sudo add-apt-repository ppa:yannubuntu/boot-repair

For Ubuntu 14.04 and newer

sudo add-apt-repository ppa:kranich/cubuntu

  • then type:

    sudo apt-get update

    sudo apt-get install -y boot-repair && (boot-repair &)

  • After using the tool in an installed Ubuntu session, remove the PPA from your Software Sources.

Using Boot-Repair

Recommended repair launch Boot-Repair from either :

the Dash (the Ubuntu logo at the top-left of the screen)

or by typing 'boot-repair' in a terminal

Then click the "Recommended repair" button. When repair is finished, note the URL (paste.ubuntu.com/XXXXX) that appeared on a paper, then reboot and check if you recovered access to your OSs.

If the repair did not succeed, indicate the URL to people who help you by email or forum.

Mario Segura
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