Microsoft Office Word Viewer 2003 and Microsoft Office Excel Viewer 2003 cannot natively open documents that are saved in the Office Open XML Formats. However, you can install the Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats to view these files.

This article describes the functionality that the Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats provides when you use it with Word Viewer 2003 and with Excel Viewer 2003.

The compatibility pack enables Word Viewer 2003 and Excel Viewer 2003 to open and view Word 2007 and Excel 2007 documents. The compatibility pack lets the viewers support the following 2007 Microsoft Office document formats.

Microsoft Office Word 2007

•	Microsoft Office Word 2007 document (*.docx)
•	Microsoft Office Word 2007 macro-enabled document (*.docm)

Microsoft Office Excel 2007

•	Microsoft Office Excel 2007 binary workbook (*.xlsb)
•	Microsoft Office Excel 2007 workbook (*.xlsx)
•	Microsoft Office Excel 2007 macro-enabled workbook (*.xlsm)
•	Microsoft Office Excel 2007 template (*.xltx)
•	Microsoft Office Excel 2007 macro-enabled template (*.xltm)
•	Microsoft Office Excel 2007 add-in (*.xlam)

To open 2007 Office documents in the 2003 viewers after you install the compatibility pack, locate the file in Windows Explorer, and then double-click the file that you want to view.

Word Viewer 2003

To use Word Viewer to open the file, follow these steps:

1.	Start Word Viewer.
2.	Click File, and then click Open.
3.	In the Files of type list, click All Files (*.*).
4.	Click to select the file that you want to open, and then click Open.

Excel Viewer 2003

You cannot click File and then click Open to open a 2007 file in the Excel 2003 Viewer. To open the file, you must locate the file in Windows Explorer, and then double-click the file that you want to view.

To download the compatibility pack from the Microsoft Download Center, visit the following Microsoft Web site: For more information about how to obtain Word Viewer 2003 and Excel Viewer 2003, click the following article numbers to view the articles in the Microsoft Knowledge Base: