This post enumerates the size of the Xilinx tool installers, the system requirements and installation documentation. It also provides a high

Download Xilinx_Vivado_SDK_2017.4_1216_1.tar.gz from the Xilinx.com download center @ https://www.xilinx.com/member/forms/download/xef.html?

Download Vivado 2017.4, install it and license it.