That's a very weird file path //bin/dbus-launch - that should've been /usr/bin/dbus-launch. Does the system hang there or does it allow you to go further?

Have you tried searching for that path in your home?
This will go through your files/documents in home and echo the filename that contains "dbus-launch":

grep -ri dbus-launch /home/myusername

Also try creating a new user.

• Press CTRL+ALT+F1 - this will get you in the console. Login with your credentials.



• Execute:

  
  
  

   sudo adduser mynewuser
  
   sudo adduser mynewuser admin
  
  

  
  
  

  It will ask for a password twice, type it in. You can leave the rest of the fields empty (full name etc.), just press enter. The second command will add you as administrator.




• Now restart your lightdm (desktop manager): sudo service lightdm restart

If the new user works, then it's definitely a problem in your home folder (probably hidden folder settings, press ctrl+H in nautilus to show hidden files/folders).