As a Ubuntu 12.04.4 LTS 32-bit user I have installed various desktop environments and discovered that somehow the loading screen and the background of GRUB2 changed from pink to grey together with a change in the icon displaying during the initial loading before user login. To revert the change I removed the installed packages with the purge option but the neither GRUB or the loading screen returned to their original state. Is it possible to restore the default behaviour of these components?
Thanks