Help please! After upgrading xUbuntu, I get this error at boot (screenshot PIC)

[tudoralexe]

My friend recently upgraded her xUbuntu on her Asus EEEPC1005HA machine, as the OS suggested.
On reboot is showing this message

http://imgur.com/HFJhjCY

What can I do?

Many thanks in advance.

[ubfan1]

Did you try rebooting from an older kernel in the grub menu (maybe under advanced options) or a try one of the recovery option boots?