When you purchase your McAfee software from the store, you will notice that there is an activation code or a product key mentioned on the retail card. To activate your subscription and install the software, you will need to visit the mcafee.com/activate page and enter the McAfee activation key. Once you enter the key, you just need to verify your email address and check the product details before you install the software. If you have any doubts about how to use the activation code, you can call the customer service number and ask for technical assistance.