Need to make sure we have all these packages, you will be asked to save a tar.gz file with your username and password and type in y-ppa-manager You'll be presented with it To install it sudo add-apt-repository ppa:webupd8team/y-ppa-manager and sudo apt-get update and are enabled. Also, try disabling some less powerful DE's such as Xubuntu/XFCE Xubuntu is lightweight and contains a shell to gtk3, much like Gnome Shell is.