When I tried to install GNOME Shell (using Ubuntu Software Center) this error showed up.
The message says:
Package dependencies cannot be resolved
This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time.
Here the dependencies:
The following packages have unmet dependencies:
gnome-shell: Depends: libpulse-mainloop-glib0 (>= 1:0.99.1) but 1:1.0-0ubuntu3 is to be installed
Depends: libpulse0 (>= 1:0.99.1) but 1:1.0-0ubuntu3 is to be installed
Depends: libxfixes3 (>= 1:5.0) but 1:5.0-4 is to be installed
So can you help me install GNOME Shell?
sudo apt-get install gnome-shell
in a terminal and paste the output in an edit, or use pastebin.ubuntu.com.