KB Article: http://support.microsoft.com/kb/926054

INTRODUCTION

You have installed the Compatibility Pack for the 2007 Office system. You then try to use one of the following Microsoft Office programs to open a file that was saved in a 2007 Microsoft Office program:

  • Microsoft Office 2003
    • Microsoft Office Excel 2003
    • Microsoft Office PowerPoint 2003
    • Microsoft Office Word 2003
  • Microsoft Office XP
    • Microsoft Excel 2002
    • Microsoft PowerPoint 2002
    • Microsoft Word 2002
  • Microsoft Office 2000
    • Microsoft Excel 2000
    • Microsoft PowerPoint 2000
    • Microsoft Word 2000

If the file was saved in a prerelease version of one of the programs that are listed in the "Applies to" section, you may receive one of the following messages.

Message 1

This file was created in a previous beta version of program 2007 and cannot be opened in this version.

Message 2

This file was created in a previous beta version of program 2007. program will convert it to the most recent version of the program 2007 file format when you save the file. Before opening this file, verify that it is from a trusted source.

Message 3

This workbook was created in an earlier beta version of Excel 2007, and it cannot be opened in the current version of Excel. To open the workbook, you must first open and save it in Excel 2007 Beta 2, and then you can open it in the current version of Excel.

Message 4

This workbook was created in an earlier beta version of Excel 2007. Excel will convert the workbook to the most recent version of the Excel 2007 file format when you save it. Before opening this workbook, verify that it is from a trusted source.

Message 5

This is a pre-release version of the Compatibility Pack and can open pre-release Office 2007 files only. Do you want to check for a newer version of the Compatibility Pack?