has AVG improved over the last 12 months or so ?
I used to get called in to fix a lot of infected machines by colleagues / friends etc, and every single machine I looked at that had AVG installed had at least two active viruses in memory.
My first scan on any AVG or Norton "protected" machine would be to run Sysclean from Trend Micro prior to sorting out any other issues !
Personally, I use Avast now (did have the free Kaspersky installed from the AOL offer), and for people who want to be really paranoid, I install Avira.
http://www.av-comparatives.org is always a handy point of reference :-)
Paris, because i'm sure she'll have caught a few nasty things in her time !