Ubuntu 14.04, only wallpaper and a mouse cursor is showing

Solution 1:

Lets reset the desktop

Press Ctrl + ALT + F2 Then you will get a full screen Terminal. Login with your Username and Password.

Then execute these commands in order:

rm -r ~/.config  
rm -r ~/.compiz  
sudo restart lightdm

This is how I solved my issue:

Press Ctrl + ALT + F2 Then you will get a full screen Terminal. Login with your Username and Password.

sudo apt-get update
sudo apt-get install --reinstall ubuntu-desktop
sudo apt-get install unity
sudo shutdown -r now

Reference: No Unity, No Launcher, No Dash In Ubuntu 14.04