Comment 18 for bug 546797

The vague "removal is fairly obvious" to a specific question about what files need to be removed and re-installed does not help the uninitiated, like myself.

When I upgraded from Ubuntu 9.10 to 10.04 I received an error message which stated that the upgrade could only be done partially. I received the following message:

The GRUB boot loader was previously installed to a disk that is no longer present, or whose normally unique identifier has changed for some reason.

I have no idea where to go from here.