title: A network-related or instance-specific error occurred while establishing a connection to SQL Server 2014
body: <p><a href="http://i.stack.imgur.com/ghJWi.png" rel="nofollow">This error</a> was returned when I tried to connect with server.
  Error description is:</p>
  
  <blockquote>
    <p>A network-related or instance-specific error occurred while
    establishing a connection to SQL Server. The server was not found or
    was not accessible. Verify that the instance name is correct and that
    SQL Server is configured to allow remote connections. (provider: SQL
    Network Interfaces, error: 26 - Error Locating Server/Instance
    Specified) (Microsoft SQL Server, Error: -1)</p>
  </blockquote>