PostgreSQL: could not connect to server: Connection refused
<p>I have a Django project, I want to switch from <code>SQLite</code> to <code>PostgreSQL</code>.</p>

<p>After installation, I can't run the command <code>psql</code></p>

<p>Here is the traceback:</p>

<pre><code>psql: could not connect to server: Connection refused (0x0000274D/10061)
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 5432?
could not connect to server: Connection refused (0x0000274D/10061)
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?
</code></pre>

<p><strong>OS: Windows</strong></p>