So as the guide says:

 

2. Once it's finished installing, go on start menu and look for the SQL Server Management Studio. Open it. It should prompt a connection window. If the connection name isn't "localhost", type it down there and click on "Connect"

 

 

Please respond.

Enable named pipes in configuration manager.

 

check that sql is actually running.

 

Check if server is running .

go to start-> all programs-> Microsoft SQL server 2005 -> configuration tools-> SQL server configuration manager-> SQL server 2005 services and there you can see if your SQL server is running or not(if not right click and start).

 

Click on servername combobox-> <browse for more...>-> network servers and wait few second, until database engine will be found and then select your server.

 

I hope it will help you .