Visit www.mcafee.com/activate to use your McAfee eCode or activation key online. Start by logging into your current McAfee account, or register for a new one if you don't already have one. After logging in, select the "Enter your 25-character activation code" option. Just go to mcafee.com/activate and sign in to your McAfee account to use your McAfee activation key. https://www.mcafecomactivate.com