If you're always running those security programs on your computer, the odds of your computer being taken over are slim (not impossible), but very slim. My bet is they got your information the old fashioned way. Have you looked into LifeLock at all? $10/month, and if this had happened while subscribed, they would have called you first before any of those loan places called you, you say it wasn't you, and you're done. They've only called me once in the past few years I've had them, and it was for a legitimate charge, which was just as easy to clear up.