Microsoft Windows Server R2 Enterprise Edition is the premier platform for business-critical applications. Windows Server 2003 R2 Enterprise Edition builds on the standard features found in the Windows Server 2003 R2 family by adding features designed to increase the reliability scalability, security, and manageability of enterprise applications.

Windows Server 2003 Service Pack 2 is a collection of updates and security enhancements to the current Windows Server 2003 operating system. Service Pack 2 (SP2) tightens security of your Windows Server and improves its performance and reliability.