The 32-bit version of Microsoft Windows Server 2003 Service Pack 1 (32-bit) is available at http://www.microsoft.com/downloads/details.aspx?FamilyId=22CFC239-337C-4D81-8354-72593B1C1F43.

This installation package is intended for downloading and installing on multiple computers. The file name is WindowsServer2003-KB889101-SP1-x86-ENU.exe and the file size is 337230 KB.

NOTE: An express installation is available at Windows Update.

NOTE: To download the Itanium (64-bit) version, visit http://www.microsoft.com/downloads/details.aspx?FamilyId=890C5C44-815C-45BD-8B08-4FE901BB8FDF.

NOTE: To order Windows Server 2003 Service Pack 1 on CD, visit http://www.microsoft.com/WindowsServer2003/downloads/servicepacks/sp1/cdorder.aspx

NOTE: You can download the Windows Server 2003 Service Pack 1 32-bit Support Tools at http://www.microsoft.com/downloads/details.aspx?FamilyId=6EC50B78-8BE1-4E81-B3BE-4E7AC4F0912D.

NOTE: If you have a beta version installed, you MUST uninstall it before installing the released version.

NOTE: See What updates are included in Windows Server 2003 Service Pack 1 (SP1)?

NOTE: See Release notes for Windows Server 2003 Service Pack 1 (SP1).

NOTE: See Updated System Preparation tool for Windows Server 2003 Service Pack 1 (SP1).

Microsoft says:

Install Microsoft Windows Server 2003 Service Pack 1 (SP1) to help secure your server and to better defend against hackers. Windows Server 2003 SP1 enhances security infrastructure by providing new security tools such as Security Configuration Wizard, which helps secure your server for role-based operations, improves defense-in-depth with Data Execution Protection, and provides a safe and secure first-boot scenario with Post-setup Security Update Wizard. Windows Server 2003 SP1 assists IT professionals in securing their server infrastructure and provides enhanced manageability and control for Windows Server 2003 users.