My friend recently did a clean install from Feisty Fawn to Hardy Heron - I am unaware of the exact details, but I'm sure a mistake was made in the process. At the moment, he cannot load Ubuntu or Windows Vista at the GRUB screen.
When he tries to load Ubuntu, he gets:
Error 17: Cannot mount selected partition
Press any key to continue...
And when he tries to load Vista Basic, he gets:
Error 13: Invalid or unsupported excutable format
Press any kay to continue...
Any help would be appreciated!