I have used Avast free antivirus for years and its rated very highly - https://www.avast.com/en-gb/index#pc
I found the TT SuperSafe Boost is this what you are using?
SuperSafe Boost Overview
Protect yourself and your family online with our award-winning software developed by Internet security specialist F-Secure. Recently improved, the SuperSafe Boost protects you against Internet threats including viruses, worms, spyware, phishing attacks, hackers and also includes parental controls.
You won't even need to worry about keeping the software up to date. SuperSafe updates itself automatically.
What is the SuperSafe Account?
SuperSafe Account allows you to manage the protection of your devices in one location. You'll have the ability to release your licenses in the Account, as well as invite your family to protect their devices. The SuperSafe Boost gives you the power to protect your devices in a number of ways.
You'll see the number of licenses you have, who they've been issued to and what devices have it.
How many licenses am I entitled to?
If you're on our Simply Broadband, Essentials TV, Fast or Faster packages you can protect
one of your devices completely
free. You can protect up to 8 devices by purchasing the Supersafe Boost in
My Account for £2. If you're a Plus TV customer you get a total of 8 Supersafe Boost licenses included in your package