How to restore ubuntu after elementary?

Question

linux

Ubuntu 14.04. I tried
to install the elementary desktop using this instruction: help.ubuntu.ru/wiki/elementary
after installing this desktop did not appear, but this is what has changed:

• When the system boots, it says that this is not ubuntu, but elementary os.
  
• I enter any desktop, the wallpaper is standard, the desktop is not clickable. There are no labels on it.
  
• When I shutdown/reboot some errors fly out, but I don't have time to write them down.
  
• I read that it can help to run nautilus, but when I run it in the terminal I get an error: Gtk-Message: Failed to load module "pantheon-filechooser-module"
  

What to do then? Help restore the desktop. Ideally, remove all consequences of elementary.