: You can also use the Stack Builder utility if you already have PostgreSQL installed on your machine to fetch the latest 32-bit drivers. Installation & Configuration Steps
On Windows, 64-bit applications use the "ODBC Data Source Administrator (64-bit)" tool, while 32-bit applications use the "ODBC Data Source Administrator (32-bit)" tool. If you install the 64-bit driver but try to connect via a 32-bit app, the driver will not appear in the list. postgresql odbc driver windows 7 32 bit download
Now that the driver is installed, you need to set up the connection. You must use the correct ODBC Administrator tool. : You can also use the Stack Builder