Properties

Name:	BUILTIN\Administrators
Friendly Name:	English
System:
Default Database:	master
Deny Windows Security Authenticated Connections:
Type:	Windows security group
Permissions to Access the Server:

Roles with this Login

	Role
	sysadmin

SQL

if not exists (select * from master.dbo.syslogins where loginname = N'BUILTIN\Administrators')
    exec sp_grantlogin N'BUILTIN\Administrators'
    exec sp_defaultdb N'BUILTIN\Administrators', N'master'
    exec sp_defaultlanguage N'BUILTIN\Administrators', N'us_english'
GO

See Also

Server overview
Logins list