Just some help for those searching the forums looking for help.
If you get the following during installation:
"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)"
Try changing the hostname in "SQL Server name or IP address:" to .\SQLEXPRESS
and if you still have a problem try changing SQLEXPRESS if you used a different name when installing SQL-Server.