Sorry, a native Windows port of PostgreSQL is not yet complete.
If you want to run it on Windows (as I am doing until my RedHat Laptop is repaired), you can do so by installing it via cygwin (http://www.cygwin.com). This is a free download, but it can take some time. I found that getting PostgreSQL up and running under Cygwin was very difficult until I read the install docs, which explained things very well :-).
I suggest read the install docs (/usr/share/doc/postgresql-7.4/FAQ_MSWIN) once you install the software. If you can't still get it running, you can send another email to the list. You may also want to look at installing the ipc-daemon2 and postgresql as NT Services.
The other document worth reading is:
----- Original Message -----
From: Arvind Tiwari
To: 'firstname.lastname@example.org' ; 'email@example.com'
Sent: Saturday, January 03, 2004 6:57 PM
Subject: [BUGS] PostgreSQL 7.4 on Windows XP?
I am an amateur & want to learn PostgreSQL.
I work on a Windows XP system.
Is there any binary installer available to install the PostgreSQL database on my windows based system?
I got this e-mail address from http://www.postgresql.org/docs/7.4/static/supported-platforms.html.
But I could not follow the Chapter 15, as I am not a programmer, I just want to use the DB for learning SQL etc.
Could you please help.