I've worked with anti-virus programs, in corporate America, since the days shortly after the Ethernet went public (beyond universities). After usenet. I worked with mainframe computers (as big as small bedrooms) and midrange and webservers (big as refrigerators). We always had to protect the corporation. That was only a small part of my job, in information technology, but a critical one.
These picture gallery sites are favored by hackers, because they are so well visited. It is not the fault of any of our posters or the webmasters of those sites. It is just a dark part of the world wide web.
On the individual level, my PC, I've found a few excellent anti-virus checkers that are free and excellent. http://www.comodo.com/home/internet-...t-security.php
This updates frequently and has never failed me.
I also use http://www.malwarebytes.org/
Their free version is just as good as their product. It has a disc scanner too.
I'm testing Microsoft Security Essentials. It seems to be an excellent product so far. Good results from 100s of other users too. Free. http://www.microsoft.com/security_essentials/
If you run this one, it would be good to run Malwarebytes with it.