Everyone has their preferences. I would recommend Microsoft Security Essentials rather than a 3rd part AV. It integrates nicely and is unobtrusive.Beth has already made contact with her bank to set up new password etc so she is well on her way. Now starts the installing of Avira, Erdnt, cookie monster, and lots of other programs, you know the drill. Biggest problem will be getting info off old hard drive. That means .... oh my gawd.
I have been running it on my desktop and laptop since the v2 beta without a hitch.