Either he line connection was interupeted or the update was close out while
installing. This is a easy fix. Go to Applications>Terminal
Open up the terminal
type this command in

sudo dpkg --configure -a

enter you pass word. It should be the same password you logged into the splash
screen with. Let it do its' mojo and you'll be smiling. The system told you what
you need to do. It just did not say how to do it.