unity - Launcher, top Panel, and window decorations missing after 12.04 upgrade

I upgraded from 11.10 to 12.04 and now my launcher is missing. I opened terminal using CTRL+ALT+T and the menu shows but the GUI (bar) window decorations above that is missing.

Things like CTRL+TAB and image previewer don't work. I've tried whats mentioned here but no luck.

Another Screenshot of my GUI looks :

I got this resolved. Apparently the upgrade process wasn't through 100%.

I did the following commands:

sudo apt-get -f install
sudo apt-get update
sudo apt-get upgrade

And somehow after a restart it magically worked.