www.mcafee.com/activate: McAfee provides a 25-digit activation key for the purchased McAfee products. It is available as a retail card in the offline package in case of offline purchase. Search the McAfee application where the files get stored during installation. Double-click on the application to launch the McAfee antivirus software activation window. Log in to the McAfee portal by opening the link mcafee.com/activate in the web browser. Type the 25-digit McAfee product activation code, along with the preferred language, country of origin, or region. Enter the preferred language and country.Enter the registered email address when prompted and submit the last set of details to verify and complete the McAfee security solution's activation process.