SQL Server Management Studio network-related or instance-specific error

Question

I get the following error when trying to connect to the default database on my computer: http://s7.postimage.org/dk5abnu15/sql_error.jpg

The underlined part means "The system can't find the file specified". But I don't have any idea what it means. I have installed SQL Server 2012 and Visual Studio 2012 Ultimate if that matters. I use Windows authentication and for Server name I type . or .\SQLEXPRESS (both don't work).

Answer 1

Go in Adminstrative tools --> Services ---> There you will find SQL SERVER and you need to start that this happened when your service stop from any reason.