Note: I got Knoppix from the DVD included with the September issue of the Linux For you magazine (thanks a lot!!). However, one can also download Knoppix from Get Knoppix

Then I followed the following steps:

Step 1: Put the DVD into the DVD-ROM and restart my pc to boot Knoppix.

Step 2: Open the terminal and login as root.

root@localhost:/home/root# fdisk -l

fdisk displays a list of the partition table. One can then easily identify the root partition. My root partition was /dev/hda1 (This may differ for you.)

Step 3: Now, we need to mount the root partition we identified in the above step.

root@tty1[knoppix]$ mount -o dev,rw /mnt/hda1

If the partition is already mounted, we need to remount it.

root@tty1[knoppix]$mount -o remount,dev,rw /mnt/hda1

Step 4: Now we can install a bootloader(grub in my case) on the mounted partition.

root@tty1[hda1]$chroot /mnt/hda1
root@tty1[hda1]$grub-install /dev/hda

That’s it . Your Linux install should be ready to boot when you restart your pc. KNOPPIX saved my ass else I would have to install Linux all over again. But I guess this problem should not again occur to me as I am now completely moved to Linux and need not install Windows again.