This worked for me:
Terminal sudo gedit /etc/apt/sources.list
add or uncomment
deb http://archive.canonical.com/ubuntu jaunty partner deb-src http://archive.canonical.com/ubuntu jaunty partner
changing jaunty to your release if different
Save and close file
Terminal sudo dpkg --configure -a
This worked for me:
Terminal sources. list
sudo gedit /etc/apt/
add or uncomment
deb http:// archive. canonical. com/ubuntu jaunty partner archive. canonical. com/ubuntu jaunty partner
deb-src http://
changing jaunty to your release if different
Save and close file
Terminal
sudo dpkg --configure -a