To everyone on these forums, MSE is more than enough for us. For normal users or new users like our family members, anti-virus is a great option.
In recent testing, Norton was ranked #1 Internet Security in the world, followed closely by Kaspersky. If you have family members who do not have AV, this would be a wonderful choice for them. They don't know as much as we do and don't know how to protect themselves.
Last comment; if you have AVG-Free installed, uninstall it. It uses way to much CPU and does almost nothing. It doesn't protect against almost anything, just Malware and Spyware.
Save your CPU some trouble.