McAfee Security is available for download from Google's Play Store. Just open PlayStore App and search for McAfee you should be able to Install it. Ensure that the publisher says Intel or IntelSecurity.
Sorry, I'm a customer just like you, all I can do is suggest an approach to solving the situation.
Mobile Support are far better equipped to deal with it.
I could download it over the Mcafee web page
But I uninstalled it again, because of performace issues... The Virus-Engine is too heavy for the Qualcomm 810 and for 2GB RAM...