When multiple sqlserver services exist, you must have a limited servername to log on.

When multiple sqlserver services exist

 

On the graphic management interface, you must specify the name (. + backslash + server name) or (Computer login name + backslash + server name)

 

 

If we only have one sqlexpress, we only need to use. As the server name.

 

In addition, the build-in account in Logon As in sqlserver service attribute panel is described as follows: original link http://msdn.microsoft.com/en-us/library/ms143170 (V = SQL .90). aspx

Ervice	SQL Server is selected as a service.
Use the built-in system account	You can assign local system, network service, or local service to the logon for the retriable SQL Server services.
Local SYSTEM account	The local System option specifies a local system account that does not require a password to connect to SQL server on the same computer. however, the local system account might restrict the SQL Server installation from interacting with other servers, depending on the privileges granted to the account. Local system is a powerful account. It might not be appropriate for all service settings. For more information, see "security considerations for a SQL Server Installation." in SQL Server 2005 books online. Important:
Network Service account	The Network Service account is a special, built-in account that is similar to an authenticated user account. the Network Service account has the same level of access to resources and objects as members of the users group. services that run as the network service account access network resources using the credentials of the computer account. We recommend that you do not use the network service account for the SQL server. Local User or domain user accounts are more appropriate for these SQL Server services. Important:
Local Service account	The local service account is a special, built-in account that is similar to an authenticated user account. the local service account has the same level of access to resources and objects as members of the users group. this limited access helps safeguard the system if individual services or processes are compromised. services that run as the local service account access network resources as a null session without credentials. for more information on service accounts, see Setting Up Windows Service accounts in SQL Server 2005 books online.

 

Question: Why is there only one sqlserver Browser Service for multiple sqlserver services. (The red part in the box below provides a strong explanation)

Start services at the end of SQL Server SETUP

Automatically starts the following services when the operating system is started. SQL Server By default,SQL ServerOption is selected. SQL Server Browser SQL Server Browser is the name resolution service that provides SQL server connection information to client computers. This service is shared across SS multiple instances of SQL Server. To enhance security in SQL Server 2005 express edition, some services and features are not enabled by default. they have to be configured and enabled after setup is finished. for more information, see SQL Server surface area configuration and security considerations for a SQL Server installation. Important: