The following bug has been logged on the website:
Bug reference: 13566
Logged by: nav singh
Email address: navaldeep.sandhu@gmail.com
PostgreSQL version: 9.3.9
Operating system: Windows 7
Description:
Trying to install the Postgis 2.1.7 extension. During the installation
stackbuilder claims it has installed the sample template, but it doesn't
exist