That's $45 too much.
I've used AVG, Avira, now Avast. Never had an issue.
I probably wouldn't have considered the free antivirus option, had I not read the A2K thread (link above), a while back.
I'd always thought (not knowing too much about these things) that "you get what you pay for" in terms of quality & reliability.
It's reassuring to have people you "know " & whose evaluations you feel you can trust recommend the free option. (Pretty broke right now.)
Still curious, though, as I consider the options ..... any XP users who have managed to download the free Microsoft option?