Possible Duplicate:
How can you remove Unity?
How to fully remove Unity Desktop Environment and associated files and dependencies from Ubuntu 12.04 and have a pure KDE installation ?
Possible Duplicate:
How can you remove Unity?
How to fully remove Unity Desktop Environment and associated files and dependencies from Ubuntu 12.04 and have a pure KDE installation ?
kubuntu-desktop
and do not bother about the presence of Unity. But if you really want a pure and hard KDE, make a complete new Kubuntu install from a cd/usb