Is there a document or help pages which shows the steps (with screenshots) for installing ArcGIS Enterprise?
It will depend on what components you want to install, and what would be your deployment scenario (Single Machine site / Multi-machine site).
For the base deployment of ArcGIS Enterprise, you could check the steps in Tutorial: Set up a base ArcGIS Enterprise deployment.
In addition to Jayanta Poddar's post, here are the links to the install guides for:
Hope this helps,
Thanks everyone but what i am really after is a visual (screenshot) step by step guide not just the words but the actal screens.
If it is an installation on a single machine this may help you
Get Started with ArcGIS Enterprise Builder - YouTube
Also the following, if you have time is about 50 minutes, Building Your First Web GIS - YouTube describes a lot of thinks on a live installation.
That video is terrific but would be great if there were a document that covered all of these
Retrieving data ...