When I use the software center to install something, I get the error:

An unhandlable error occured

There seems to be a programming error in aptdaemon, the software that
allows you to install/remove software and to perform other package
management related tasks

on using the command line:

$sudo apt-get install <something>

E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. 

I am unable to install anything. How do we fix this?