allow updates Option
This option is still present in the sp_configure stored procedure, although its functionality is unavailable in Microsoft SQL Server 2005 (the setting has no effect). In SQL Server 2005, direct updates to the system tables are not supported.
Changing the allow updates option will cause the RECONFIGURE statement to fail. Changes to the allow updates option should be removed from all scripts.
Setting Server Configuration Options
Help and Information
Getting SQL Server 2005 Assistance
14 April 2006