Office XP Service Pack 3 (SP3) provides the latest updates to Microsoft Office XP. SP3 contains significant security enhancements, in addition to stability and performance improvements. This service pack applies to any level of Office XP. It contains all updates included in Office XP Service Pack 1 (SP1) and Office XP Service Pack 2 (SP2), and updates released after SP2. Microsoft recommends that you use the Office Update site to determine if your computer requires this update before installing it.