This question already has an answer here:
First of all: I speak Spanish.
So I hope you understand what I am asking:
Recently I successfully installed Ubuntu 13.04.
So after a week, I turn on my computer and this is what I get.
This shouldn't appear, It has to appear just when I press F10.
So, when I select Ubuntu in Grub, appears a black screen like this:
So after this, I can't do anything... Ctrl+Alt+Del and F10 doesn't work... So I just turn off my computer the bad way.
What can I do?