pgAdmin and PostgreSQL are two separate applications. And they are not dependent on each other.
pgAdmin is a PostgreSQL client and management application that has many advanced features beyond just being a client.
PostgreSQL is an open source relational database management system. In other words, it is a database server/service.
As far as I can see, you wanted to install a local PostgreSQL server and connect to it through pgAdmin. You need to ensure that you have an installed and working PostgreSQL service on your workstation. You can use EnterpriseDB's installation bundle for Windows. They also created a cool installation guide, which I saw while writing the email.
I've just install latest version of the PgAdmin4 for windows but I cannot set up a server.
Did you install pgAdmin4 and PostgreSQL from the same bundled installer? Was PostgreSQL already installed? Were you trying to upgrade it at the same time as upgrading PgAdmin4?
Path settled, port configuration settled however postgre is not shows services.msc,
I don't know what "path settled" means. But your image of services.msc is showing the wrong part of the alphabet to show 'PostgreSQL'.
