You need to query the registry.
DECLARE
@DefData nvarchar(200)
EXEC
master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE',N'Software\Microsoft\MSSQLServer\MSSQLServer',N'DefaultData', @DefData output
SELECT
@DefData
Markus
[font="Verdana"]Markus Bohse[/font]