SQL 2008 R2 error: SQL Network Interfaces, error: 26

Question

SQL 2008 R2 error: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

 

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)

 

And Don't Show this Properties

 

SQL Server Configuration Manager > SQL Server Services > In Right Side window show all the servers which may stop. If you are using "SQLEXPRESS" then , Right click on SQL Server(SQLEXPRESS)  

 

And Don't Show this Properties