Why does Windows Automatic Updates ignore SQL Server service Packs?
Windows Server 2003 Standard X64 Service Pack 2
No WSUS server in the picture just Automatic Updates enabled.
Default install of SQL Server 2005 Standard and Automatic Updates won't display Service Packs for SQL Server. It shows all kinds of other critical security updates for the OS, IE, etc…
Best Answer
I know this sounds terribly obvious - but are you using Microsoft Update, or Windows Update? If the latter, you need to enable the Microsoft Update feature that checks for all MS products, not just integral OS components (like IE)