Windows Small Business Server 2003 Service Pack 1; ... In Windows Explorer, open the SP1 folder, and then double-click WindowsServer2003-KB889101-SP1-x86-ENU.exe.
http://technet.microsoft.com/en-us/windowsserver/bb841405.aspx For Windows Server 2003 Forums: http://www.microsoft.com/windowsserver2003/sbs/community/default.mspx