As for whether I was infected or not (or you) I did have my first virus 2 months ago. But the damn AV picked it up and then didnt quarantine it (my fault I was on "Prompt only" default stupid setting) Free AV program (forget which one it was, PC AntiVirus?) wouldnt fix it so I tried other free progs. Some on 30 days (useless). Others missed it but falsly reported other infections.
Anyway, long and short, now on Avira AV. Totally free. Constant free updates. Seems to work very well. avira.com. Try it instead of your one.