I use AVG and update it regularly. The latest update threw up a virus which had attached itself to a marketplace product. Obviously, I understand that can't be conclusive so I downloaded the item again and scanned it. It showed up positive again. I let the relevant people know and have been waiting for a reasonable reply ever since. The virus in question is the Trojan backdoor.remotesob. Not particularly malignant but allows the perpetrator to scan my system. Not very nice at all. The worst of it all is that the item in question was a particularly useful poser utility which I can no longer use. I'd just like to say that I thought I was safe behind a firewall with automatic scanning on but this one still got through. I think that it was purely because AVG caught up with a recently produced version of the virus...