This is the software publisher's description.

Windows Vista Service Pack 2 (SP2) is an update to Windows Vista and Windows Server 2008. It provides customer and partner feedback driven fixes into a single service pack, minimizing deployment and testing complexity. In addition to all previously released updates, SP2 contains changes focused on addressing reliability and performance issues, supporting new types of hardware, and adding support for several emerging standards.

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 Vista and 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.

This is a download that can be installed on Windows Vista SP2 32-bit only.

Important: we suggest you read the Windows Vista SP2 release notes before installing.