First of all a thank you to the developers of Boot-Repair.
I was running Ubuntu12.04LTS on a laptop setup with Vista dual boot.
Then I played with another Linux version and managed to trash the U12.04LTS partition.
At boot up I only got the Grub Rescue prompt.
The Linux file system was gone/damaged.
The Vista file system still looked like it was there (sda2).
I was forced to use GParted on U13.10 Live CD to delete the Linux partitions (both sda5 and sda6 for U12.04LTS and linux-swap).
It looks like the Vista partition is still recognized OK.
I had to do a manual install of U13.04 (automatic would not work)
I created a new partition for U13.04 (sda3) and Linux-swap (sda4)
Installation looked like it completed successfully.
However, after reboot, I still got the Grub Rescue prompt.
Now the correct file systems were recognized with the 'ls" commands.
Then I ran standard Boot-Repair from Live USB.
This fixed the Grub and I can now boot the U13.04 correctly.
In the Grub menu, also the Vista option is shown.
However, selecting that option just cycle back to restarts Grub and does not boot Vista.
I used the standard Boot-Repair and I saw MBR and Windows boot options in the advanced menus, but I did not touch them, following advice on the Boot-Repair webpages to first consult this forum/thread.
Can somebody advice how I fix the Grub, such that I can also boot Vista from the Grub menu ?
(I am not sure if the Vista installation actually still works, as I have not been able to boot it yet. I have not yet used the VIsta recovery CDs )