Microsoft Office setup can download online using the internet easily. Go to the official site office.com/setup and purchase it. Save it, run it and pass through some easy instruction and agree all the policies. When you open application, it shows an alert about Activation. Active it online using the office product key. A product key is of 25-characters and it is sent to you by confirmation mail. But if you want to install it using a CD drive, insert CD and run it. It will start the same process of installation as given above. call Office.com/Setup Support toll-free number, 1-888-827-9060 for an immediate support by a certified technician.