How to manually install boot loader?

Solution 1:

Here's what I'd do:

Boot the machine using a Live CD.
Open a terminal.
Find out the name of the internal disk by using fdisk to look up the device's size.
For example:
```
sudo fdisk -l
```
Install GRUB boot loader onto the proper disk (the example below assumes it is /dev/sda):
```
sudo grub-install --recheck --no-floppy --root-directory=/ /dev/sda
```