For McAfee Activate, Download & complete installation online for your windows PC, MAC and Mobiles. This page helps you to Activate McAfee. You can activate McAfee Antivirus here or from mcafee.com/activate. If you have purchased McAfee activation card from a store or www.mcafee.com/activate you should have a activation code. To install and activate McAfee Antivirus in your computer or any other device, just go through 3 easy steps to download McAfee and activate it in your device. Instead of using CD & DVD disk, retail cards allow you to download the latest version of the McAfee security product from the internet.