Anti-Virus software package

[patriach]

Hi fellow lurkers,

I am helping my friend's aunt to install an all-in-one anti virus and firewall in her computer. The problem is she didn't know which software to install and asked me to choose one for her. I have no problem choosing one, except for the fact that she is not really computer-savvy. So does anyone have a recommendation for a good but relatively cheap software package and most importantly, very easy to use?

Thanks in advance