Скачать или смотреть SQL Server Error 40: Named Pipes Provider

In this video, we'll have a look at the SQL Server error message 40 (more below).
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This error is one which you can see when you connect, possibly with SQL Server Management Studio (SSMS):

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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2).
The system cannot find the file specified.

In this video, we'll have a look at three possible causes, and how to correct them.