In order to activate the mcafee antivirus on your device, user need to visit mcafee.com/activate. Now enter the product key which came along with the product during the time of purchase.The activation code can be found on the cover or inside the box of the product on the sticker. But, if have purchased it online the key must be found it in the mail box of your registered mail id. Now copy the product key and paste in the required filed. Now click on the submit button. The product key successfully redeemed the key and now download the product online.