Windows Server 2008 R2 is a minor update to Windows Server 2008 that provides improved features and management capabilities. Key areas of focus for Windows Server 2008 R2 include virtualization with enhanced Hyper-V capabilities like live migration, Remote Desktop Services improvements, management and administration enhancements through Windows PowerShell, and reliability/scalability with support for up to 256 logical processors. The optional R2 update model allows IT flexibility in upgrading without forcing an entire infrastructure update at once.