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When the bootloader (GRUB) is broken, I cannot access neither Ubuntu nor Windows.

I heard that an easy solution to fix this is to use the Boot-Repair tool from an Ubuntu liveCD (or liveUSB).

What are the steps to do this?

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2 Answers 2

up vote 9 down vote accepted
  1. Insert the Ubuntu disc, or connect the Ubuntu liveUSB.
  2. Setup the BIOS to make it boot on the Ubuntu disc
  3. Reboot the PC
  4. When asked, choose Try Ubuntu Try Ubuntu
  5. Connect internet
  6. Open a terminal, and type (or copy-paste) the following command:

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

Press Enter, then type the following command:

sudo apt-get update

Press Enter, then type the following command:

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

Press Enter. That's it, the Boot-Repair window will appear!

Boot-Repair main window

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It would be awesome to get this pre-installed on the live dvd's for future releases, because this is such a critical tool with the latest window$8 UEFI mess :( –  AmanicA Dec 5 '13 at 12:11
you can vote for this: bugs.launchpad.net/boot-repair/+bug/806291 –  LovinBuntu Dec 5 '13 at 21:19
This gives me an error "must run in 64 bit session" –  JohnMerlino Apr 27 at 17:49
John, that message indicates you need to use a 64bit Ubuntu disc. –  LovinBuntu Apr 27 at 22:33
What if I don't have internet on the PC I want to repair? How can I get Boot Repair on the live usb? –  becko Aug 1 at 15:10

I am using Ubuntu 12.04.

You should use

sudo apt-get install -y --force-yes boot-repair && boot-repair

instead of

sudo apt-get install -y boot-repair && boot-repair
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No, --force-yes is not necessary. –  LovinBuntu Dec 14 at 23:15

protected by Community Mar 5 at 15:33

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