How to install PostgreSQL on Windows OS

Describes how to you can to do the following?

Know about platform that PostgreSQL supports and the System Types which supports them
Check your System Type i.e. CPU_PROCESSOR and Platform type i.e. Operating System
Determine which version to download and Install that is compatible with your system
How to configure your environment to have a smooth and swift working experience
Test the Installation using pgAdmin, SHELL (psql) app, and the command prompt.