To perform an installation using the graphical installation wizard, you must have superuser or administrator privileges. To start the installation wizard, assume administrator privileges, and double-click the installer icon; if prompted, provide a password.Note that in some versions of Windows, you can invoke the installer with Administrator privileges by right clicking on the installer icon and selecting Run as Administrator from the context menu.Click Next to continue. The Installation Directory window (Figure 3.2) opens.Accept the default installation directory, or specify an alternate location and click Next to continue.The Data Directory window opens, as shown in Figure 3.3.Accept the default location or specify the name of the alternate directory in which you wish to store the data files, and click Next to continue.The Password window opens, as shown in Figure 3.4.Figure 3.4 – The Password dialog.PostgreSQL uses the password specified on the Password window for both the database superuser and the PostgreSQL service account.PostgreSQL runs as a service in the background; the PostgreSQL service account is named postgres. If you have already created a service account with the name postgres, you must specify same password as the existing password for the postgres service account.The specified password must conform to any security policies existing on the PostgreSQL host. After entering a password in the Password field, and confirming the password in the Retype Password field, click Next to continue.Figure 3.5 – The Port dialog.Use the Port field to specify the port number on which the server should listen. The default listener port is 5432 (shown in Figure 3.5). Click Next to continue.Use the Locale field to specify the locale that will be used by the new database cluster. The Default locale is the operating system locale (shown in Figure 3.6). Click Next to continue.The wizard will inform you that it has the information required to install PostgreSQL (see Figure 3.7); click Next to continue.During the installation, the setup wizard confirms the installation progress of PostgreSQL via a series of progress bars (see Figure 3.8).Before the setup wizard completes the PostgreSQL installation, it offers to Launch Stack Builder at exit (see Figure 3.9).You can optionally un-check the Stack Builder box and click Finish to complete the PostgreSQL installation or accept the default and proceed to Stack Builder.The Stack Builder utility provides a graphical interface that downloads and installs applications and drivers that work with PostgreSQL. You can invoke Stack Builder at installation time or (after the installation completes) through the PostgreSQL 9.5 menu. For more information about Stack Builder, see , Using Stack Builder.