The document summarizes the license terms for various versions of Microsoft Windows Vista software. It outlines that the software is licensed on a per device basis to the device on which it was acquired. It also describes the installation and use rights including limitations on the number of users and processors. The document provides details on mandatory activation and validation procedures that associate use of the software with a specific device and verify proper licensing. It also references Internet-based services that the software connects to and the information transmitted during those connections.