How to Upgrade Microsoft Excel

1. Insert the install CD or DVD into the disk drive.
2. Enter your product key when prompted. This will occur after the install screen has popped up. If the install screen does not come up automatically, then navigate to your CD/DVD drive through 'My Computer' and double click on the Microsoft Office disk icon. The product key can be found on a sticker on the CD case inside your Microsoft Office box.
3. Accept the Microsoft License agreement.
4. Select 'Install Now' or 'Customize.' 'Install Now' will upgrade all previous versions of the Microsoft Office program that correspond to your recently purchased Office software. 'Customize' will allow you to specify which applications and features are upgraded.
5. Activate your product after the installation is completed. Activating over the internet is the quickest method if you have an internet connection. If you decline activation at this time, you will be prompted to activate each time you open an Office program.