Here are some of the prevalent errors that may bother you while activating McAfee subscription from a CD or a retail card. You are unable to redeem your McAfee activate product key using a retail card or encounter any installation error through a CD. You can seek expert help from McAfee customer support service by using different communication channels that are accessible via mcafee.com/activate. Visit: http://mcafee-comactivates.me/mcafee-activate/