The internet said that use of localhost can, is true, but some will still report that can not find errors, I can not pass the time to reinstall the SQL Server, this time to select all the default installation, the previous use is to select the installation, and then found a few more configurations, including one is to establish an instance, Then I select the default again, after the installation completes, then starts SQLServer2012, the server name enters localhost, the connection, OK.
Conjecture: It is estimated that the installation is not the result of an instance, the machine does not install an instance, so filling localhost is useless.
The above is a small set to introduce SQL Server 2012 after the installation of the server name can not find a solution, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!