Need to manually install bootloader [duplicate]

Question

Possible Duplicate:
How to manually install boot loader?

Grub failure when installing 12.4 alongside Windows 7 (50 GB partition for 12.4), need to manually install bootloader. Where can I find this?

Answer 1

What you need to do is create a Boot-Repair Live USB or Live CD. This will repair Grub and allow you to boot Windows and Ubuntu again. You can find instructions on creating a Boot-Repair Live USB or CD here.

Answer 2

install Boot-Repair in Ubuntu

1. Boot your computer on a Ubuntu live-CD or live-USB.

2. Choose "Try Ubuntu"

3. Connect internet

4. Open a new Terminal Ctrl+Alt+T, then type:

   sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update

5. Press Enter.

6. Then type:

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

7. Press Enter.

Using Boot-Repair

Recommended repair

1. launch Boot-Repair from either :

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

   b. Or System->Administration->Boot-Repair menu (Ubuntu 10.04 only)

   c. Or by typing 'boot-repair' in a terminal

2. 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.

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