McAfee.com/activate is one of the trusted names amongst online security solution providers. It protects your home and business PCs from viruses and other malicious programs. Once you purchase, download and install a McAfee antivirus (Keeping in mind the level of security you want for your device), the subscription needs to be activated. This activation confirms your purchase with McAfee by using a product key. Finding a product key for the activation depends upon the fact i.e. from where you have purchased an antivirus.