Ok my freind uses AVG pro, I personally use bit defender. Anyway he was having problems with large numbers of trojan.danmec.??? appearing on his system AVG pro found large numbers but of course was not clearing up the source. As his most knowledgeable friend he asked me to help. I thought another AV might find the source so I used bitdefender online scan on his system we found 30 instances of various objects. But after the scan we ran AVG pro again and found 78 trojan.danmec.??? again. So we totally nuked his system as I did not know how to track down the source of the recurring infection. His system is now clean. But just wondering how I would go about tracking down the source. Because nuking a system is dodgy as we have to remember where all his data is stored, if we miss some its gone forever. I personally lost lots of data in several similar incidents when I was naive on the net. I rarely get a virus these days, and can clean up fast. I also know where all my data is as I finally decided to standardise where I keep my data, I convinced my friend to do the same so going forward he faces a little less risk.
This is not just a selfish request as if I could find the source I could submit it so bitdefender can find it and its brothers. I would like to give back to bitdefender as it has rid me of many virii over the years.