The 2007 Microsoft Office Suite Service Pack 1 provides critical, customer-requested stability and performance enhancements, while incorporating more improvements in user security. This Service Pack also includes all updates released for the 2007 Office suite before December 2007. A more complete description of SP1, including a list of issues that have been fixed, can be found in the Microsoft Knowledge Base article 936982: Description of the 2007 Microsoft Office Suite Service Pack 1. Service Pack 1 will be installed even if the released updates are already installed on your computer.