I'm only asking this question because any other answer I found online to this problem didn't help me resolve it.
Basically I updated my Ubuntu 14.04 system last night and it asked me to restart my system. When I restarted it and logged in to my admin account the Unity interface didn't load. I could only see my background and Ubuntu 14.04 written in the bottom right corner of the screen. No shortcuts work like Alt+Ctrl+t to open the terminal, the mouse right click doesn't work either. I can only access the terminal with Alt+Ctrl+F1. I restarted the system several times and it was the same every time. I can, however, log in to another account which is not an administrator account, and that's what I'm using right now, but I don't have access to all my files from my admin account which I normally use.
I tried a number of solutions that people said worked for them in similar circumstances but none of them worked. I even installed gnome to see if that will help, but it didn't. Again I could only log in to the other non-admin account which displayed gnome without a problem, but the admin account didn't move past the background after login.
I even tried booting to another kernel in advanced options but that didn't work either.
I found the following solutions online which I tried but none of them worked:
sudo apt-get install unity-tweak-tool unity-tweak-tool --reset-unity
Another one was:
sudo apt-get install compizconfig-settings-manager export DISPLAY=:0 ccsm
Also this one:
sudo apt-get update --fix-missing
And this one:
sudo apt-get purge lightdm sudo apt-get update sudo apt-get install lightdm dpkg-reconfigure lightdm sudo shutdown
None of these worked. Can anyone please help me with this?