You got popular just by the very nature of connecting your computer to the net.
There are lots of doors into your computer Lobo that your firewall would never see, especially if you've downloaded something by accident that opened up a port of entry. I don't know the type of sites you visit, but warez site especially are full of scripted dowloads of malware and virus's, many of which if allowed to stay on your computer will open up backdoors. If you want my suggestions on how to figure out what got in and how to keep them out, for starters I would say make sure your OS and browser and any programs you use often have been updated. Also shut down the various windows services which as good points of entry which you shouldn't need like telnet. I would also try digging around and seeing if the pics are all that has been added and checking out your networking settings and what ports are open. Also, if your firewall allows you to decide which programs are allowed to access the net, take a look at them and see if any programs you don't think should be there are accessing the net. Also if it has an area that will allow you to see the networking traffic of your computer take a look at it and make sure it is not very heavy at odd times, if it is, could mean someone is hosting a porn site off of you or using your puter as a bot. If you are always connected to the net, a hardware firewall wouldn't be a bad investment in addition to the software firewall you have. The one we use at work for when we're surfing sites likely to have auto malicious code downloads keeps a lot of the garbage from getting in.
