How to Upgrade Excel 2003 to 2007

1. Insert the Microsoft Office 2007 CD into your computer's disc drive. The automatic setup will begin.
2. Type the product key into the text box. The product key is a 25-character key and is usually located on the back of the CD jacket.
3. Click on the 'I accept the terms of this agreement' check box and then click on the 'Continue' button.
4. Click on 'Upgrade,' which will remove Excel 2003 and replace it with Excel 2007. Wait for the installation to complete; it will take 15 to 30 minutes.
5. Click on the 'Close' button to complete the installation of Excel 2007.