I have not looked at the full McAfee product in detail nor am I am FIOS subscriber, but these days you need to have multiple layers of Internet security per security experts. Anti-virus by itself does not cut it. Some additional security tools, Malwarebytes Premium https://www.malwarebytes.com/products/
with web, exploit, malware, and ransomware protections and SpyShelter https://www.spyshelter.com/
with keylogging, your keystrokes are encrypted, screen, and webcam protections can be added on top of your existing anti-virus software, which I have been doing for years, and the price is well worth it vs. cleaning up an identity theft situation. Also for free browser addons - Malwwarebytes for downloads protection, a web site advisor (green, yellow, red, not perfect, but better than nothing), and ScriptSafe available for Firefox and Chrome which blocks scripts running on website except those you allow (initial setup takes some time). Also updating your software is important, SUMo updater (free or paid) is very good, your Windows updates, and updating your security software. I also have a wired router, better than a Wifi router even with passowrd protection, per security experts where I used to work, and my email with advanced Sieve filtering (fastmail.com) where have only received less than 25 spam emails in the last two years. Also common sense, not opening unknown emails, attachments, or weblinks, and a dose of prayer goes a long way.
If using a smartphone, the layered security is not there yet, so I avoid sharing sensitive information there, such as SSN, date of birth, logging into bank accounts, debit card number, but credit cards are ok (if CC hacked, more easily fixed).