I currently use Microsoft Security Essentials to protect my computer but BT have now offered me free of charge:
Free NetProtect Plus - Advanced McAfee security software helps protect your computer from online hackers, viruses, and ID theft. Plus free Family Protection, which has parental controls, search blockers and time limits, to ensure children don't see anything they shouldn't. To protect up to seven PCs,
access to McAfee software, the McAfee software is free for you contract lenght. Once you contract length expires then you will either have to extend or enter a new contract with BT which will then come with what BT have to offer in say 12 or 18 months time. They use to issue Norton now there on McAfee.
Microsoft Security Essentials is fair, but not as advance as McAfee if it is the full package. As long as it included "Firewall" as well and Virus package protection your safe.
Reason I don't like AVG to every group member the AVG FREE package does not have Firewall built in! and leaves it to Windows Firewall.