Where did I pick this up?

Okay I admit I have gone to a couple of seedy corners, but I try to keep my nose clean. My son doesn't visit the same corners, but he is 14 and so he frequents on line radio sites, does a million searches for lyrics to his favorite songs. Somewhere along the line we picked up a Pipas A. trojan. I posted a HJT log 3 days ago, but no answers so far. But after doing my best to clean up Microsoft found nothing, nor did Norton, or Adaware. Spybot picked up the Pipas A. I asked it to remove it and I haven't tested it yet. From what I understand though it's a toughie to get rid of! If it doesn't work I will post an up to date HJT log with this info. Assuming we can rid ourselves of this menace, how can I ensure I don't get it again? Any thoughts would be greatly apprciated. By the way, just a thought… if spyware, malware etc is designed to redirect us to other websites, log our preferences then why would they wreak so much havoc forcing us to get rid of them? I would think they would want to be as innocuous as possible so as not to be detected.

Micah, thank you for the quick reply. I printed the instructions and can't wait to get home and give this a shot! Any thoughts though on this particular trojan? I am tempted to think it came from one of these lyrics sites. I have gone to them on occasion and they seem to bombard you as soon as you open them with a barrage of "stuff".

Truthfully, I don't know exactly how Wareout gets installed?

http://www.wilderssecurity.com/showthread.php?t=27971

Complete your work with Micah in Malware Removal before installing any additional utilities.
Micah will give you some additional recommendations after you are all clean.
You can, however, start reading/studying from some of the great sites like TomCoyote and WildersSecurity article by Tony Klein.

Best Regards