Step 1: Click the "Control Panel" menu command, as shown in the figure.

Step 2: Double-click the Add/Remove Programs icon.

Step 3: Switch to the Change or Remove Programs tab, select the Microsoft Office Professional Edition 2003 option in the Currently Installed Programs list, and then click the Change button.

Step 4: Select the Add or Remove Function radio box and click Next, as shown in the figure.

Step 5: Select the checkbox of "Select Advanced Customization" and click "Next", as shown in the figure.

Step 6: Click the Formula Editor option. Select the "Run from this computer" command in the menu that opens, as shown in the figure. ?

Step 7: Click the browse button to find the Office installation source file, and click the OK button to complete the installation, as shown in the figure. ?