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This package from Microsoft lets you open, edit and save files that use file formats from the Office 2007 editions of Word, Excel, and PowerPoint (obviously if you only have a viewer installed, you won't be able edit files, but just view them). The purpose of this download may not be immediately apparent, so here is what it means. Without the update, you won' t be able to properly open Office 2007 files in earlier versions of Office unless you have this update. In geek-speak, the Office 2007 files are not backwards compatible. If someone creates a Word file in Office 2007 and sends it to you, but you only have Office 2003, you won't be able to properly open the file (it may contain gibberish or errors). This download fixes that problem.

Supported Operating Systems

Windows 2000 Service Pack 4, Windows XP Service Pack 1, Windows Server 2003

Supported Versions of Office and viewers
Microsoft Word 2000, Excel 2000 or PowerPoint 2000 (all require Service Pack 3)

Microsoft Word 2002, Excel 2002 or PowerPoint 2002 (all require Service Pack 3)

Microsoft Word 2003, Excel 2003 or PowerPoint 2003 (all require Service Pack 1)

Microsoft Office Word Viewer 2003

Microsoft Office Excel Viewer 2003

Microsoft Office PowerPoint Viewer 2003