How to determine the name of the instance of the Database Engine

Developers should follow the next steps:

1. Log into Windows as a member of the Administrators group, and open either Management Studio or Management Studio Express Edition

2. Click Cancel in the Connect to Server dialog box.

3. Click Registered Servers, on the View menu, if Registered Servers in not displayed.

4. With Database Engine selected on the Registered Servers toolbar, right-click the Database Engine node in the tree, and then click Update Local Server Registration. The default instance is unnamed and is shown as the computer name. A named instance displays as the computer name followed by a backward slash (\) and then the name of the instance. For SQL Server 2005 or SQL Server 2008 Express Edition, the instance is named <computer_name>\sqlexpress unless the name was changed during setup.