Microsoft has released two new Cumulative Updates for SQL Server 2008 today. The first one is SQL Server 2008 SP3 CU5, which is Build 10.00.5785.00. There are only four fixes listed in the public fix list. The second Cumulative Update is SQL Server 2008 SP2 CU10, which is Build 10.00.4332.00. There is only one fix listed in the public fix list for CU10. Remember, both of these are for SQL Server 2008, not for SQL Server 2008 R2.
In order for you to install SQL Server 2008 SP2 Cumulative Update 10, you must have SQL Server 2008 SP2 installed first. In order for you to install SQL Server 2008 SP3 Cumulative Update 5, you must have SQL Server 2008 SP3 installed first. When you download a SQL Server Service Pack, you must get the appropriate version of the Service Pack to match what is installed on the machine you want to upgrade. This could be the x86, x64, or ia64 version. If you don’t know what version of SQL Server is running, you can run SELECT @@VERSION; to find out.
As the name implies, a Cumulative Update is actually cumulative, which means that it includes all of the fixes for all of the previous Cumulative Updates for the version and Service Pack of SQL Server.