How to Open an Excel 2007 File in Excel 2003

1. Go to the download page for the Microsoft Office Compatibility pack using the link in the References section of this article.
2. Click the 'Download' button, and save the file to the location of your choice. The name of the download is 'FileFormatConverters.exe.'
3. Launch the program. You may have to click a 'Run' button to confirm that you want to run it. Read the license agreement for the software. If you agree, put a check in the box and click 'Continue.' The installation will proceed automatically. Click 'OK' when it is finished.
4. Restart your computer.
5. Double click the Excel 2007 file with an XLSX extension. You will see a window saying 'File conversion in progress.' After a few seconds, the file will open.