Here is the announcement about SQL Server 2005 Service Pack 4 RTM which has been CTP for a month or so to test and apply on your current 2005 production estate. Before downloading make sure to go through the ReadmeSQL2005SP4.htm and go through the Release notes section, additionally make sure to update your local copies of SQL Server 2005 Books online. As per hte line you can obtain Books Online in the following ways: Install Books Online by selecting the SQL Server 2005 Books Online feature in this...(<a href="http://sqlserver-qa.net/blogs/tools/archive/2010/12/18/sql-server-2005-service-pack-4-rtm-test-and-download.aspx">read more</a>)<img src="http://sqlserver-qa.net/aggbug.aspx?PostID=9838" width="1" height="1">