These links show you how to install SI 2016.
Installing the SI 2016 Server
Installing Visio Optional. If you will be using any supported third-party software, we recommend installing Visio, AutoCAD, and QuickBooks on the all machines prior to installing the SI 2016 Client.
Installing an SI 2016 Client
Registration
Upgrading from SI 2015
Upgrading from SIX 2013
Updating SI 2016
SI 2016 Release Notes