The 2007 Microsoft Office suite Service Pack 1 delivers important
customer-requested stability and performance improvements, while
incorporating further enhancements to user security. This service
pack also includes all of the updates released for the 2007 Office
suite prior to December of 2007. You can get a more complete
description of SP1, including a list of issues that were fixed, in
the Microsoft Knowledge Base article 936982: Description of the
2007 Microsoft Office suite Service Pack 1.
Service Pack 1 will install even if a publicly available update has
already been installed on your computer.
SP1 also includes stability improvements developed as a result of
user input from the Microsoft Online Crash Analysis and from
Microsoft Product Support feedback
Microsoft Office 2007 Service pack 1