calliopes_pen | Computer Issues...Help?

Okay, my computer has been seriously weird for the last few days. For absolutely no reason, it suddenly started to get pop-ups every few minutes. And now, they seem to almost be progressing to porn levels, too...some sort of dating site, with mostly naked women was the pop-up. I didn’t look for more than a second before closing it out. The other pop-ups consist of credit related things, something about a university, and a lot of things about anti-virus software.

I’ve run a scan, and it says it’s a lot of Spy cookies. When I checked the other day, we caught 3 Adwares, some Spyware, (and something that might have been a virus, but Spy Sweeper called it a behavioral--I don't know what that means) and a ton of Spy cookies, so it’s gone down on that front. So I have to come to the conclusion that it’s because of a site I’ve visited lately. However, the only sites I’ve gone to in the last few days are Insanejournal, Livejournal, Scribbld, a brief check over at Greatestjournal, and (for Doctor Who fanfic) A Teaspoon And An Open Mind.

Oh, and Fanfiction.net, when an author I’m following updates, but they’ve never done anything to my computer before. Although, come to think of it, that’s the last site I went to before the whole mess started on Sunday...

Any ideas on what this is, and how to fix it?