mcafee.com/activate - McAfee antivirus scans and updates your computer from online threats. First, you need to create a McAfee account. Already have an account? Then directly sign in to it. Go to mcafee.com/activate to choose your desired McAfee product. Before using the McAfee features, download, install, and activate the McAfee product with 25-digit alphanumeric product key. Now, the protection for your computer data gets started automatically.