Service Pack 2 for Windows Server 2008 and Windows Vista (SP2) is an update to Windows Vista and Windows Server 2008 that supports new kinds of hardware and emerging hardware standards, and includes all updates delivered since SP1. SP2 simplifies administration by enabling IT administrators to deploy and support a single service pack for clients and servers. Please see the Windows Server SP2/Windows Vista SP2 page on TechNet/MSDN for additional details and documentation.

Windows Vista SP2 TechNet
Windows Server 2008 SP2 TechNet

SP2 is an update to Windows Server 2008 and Windows Vista that incorporates improvements discovered through automated feedback, as well as updates that have been delivered since SP1. By providing these fixes integrated into a single service pack for both client and server, Microsoft provides a single high-quality update that minimizes deployment and testing complexity for customers.

SP2 is an update to Windows Server 2008 that addresses feedback from our customers and partners. By providing these fixes integrated into a single service pack, Microsoft provides a single high-quality update that minimizes deployment and testing complexity for customers.
In addition to all previously released updates, SP2 will contain changes focused on addressing reliability and performance issues, supporting new kinds of hardware, and adding support for several emerging standards. SP2 will also continue to make it easier for IT administrators to deploy and manage large installations of Windows Server 2008.

Service Pack 1 is a prerequisite for installing Service Pack 2. Please make sure that your system is running Service Pack 1 before you install Service Pack 2.

Note: Windows Server 2008 released with Service Pack 1 included.

Windows Server 2008 Service Pack 2 Five Language Standalone for ia64-based systems can be installed on systems with any of the following language versions: English, French, German, Japanese, or Spanish.

If your system has additional languages please use the All Language Standalone for ia64-based systems to install SP2.