Hey guys, first of all sorry for my english but it's not my native language
I am having problem starting ubuntu . I used to use ubuntu but after an upgrade they crashed
This is what i get when I try to start them :
GNU GRUB version 1.99-12ubuntu5.1
Mnimal BASH-like editing is supported , For the first word , TAB lists possible commant completions. Anywhere else TAB lists possible device or file completions

What do I need to do to get ubuntu back ?