Network Programming in .NET

The Microsoft Windows Update KB2463332 makes your SQL server 2005 inaccessible during installation

If, you’ve got a situation where your database needs to be online 100% of the time, then take care when installing this update, and make sure you’ve got a backup in place.

The error message reported from SQL server during installation is:

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: 53)

– It works fine once the installation is complete.