I need to install the Graphics Driver in my Ubuntu 16.04 but when I try to install the Intel Graphics updater I get > This package is uninstallable Dependency is not satisfiable: libpackagekit-glib2-18.
Which version of the Intel Graphics Updater did you download? There are two most recent; v2.0.4 and v2.0.2. You want to be using v2.0.2 for Ubuntu 16.04, so if you have downloaded v2.0.4 that may be your issue.
v2.0.4 has been compiled for Ubuntu 16.10 whereas v2.0.2 has been compiled for Ubuntu 16.04. 16.04 does not have the libpackagekit-glib2-18 package in its repositories, so v2.0.2 is the latest supported version for 16.04.