Download the Microsoft antispyware utility and update it. It's really nice. Get the current version of HijackThis too, v*.**.*.
They have a tutorial on HJT at ComputerCops.com that will familiarize you with what different sections of the report deal with. There's also a forum where people in-the-know can walk you through cleaning up your machine. Unregistered was right, you'll need assistance and have to remove some of it in safe mode:
[url]http://computercops.biz/[/url]
A word of advise, next time you reformat run HJT before going online and save the log. Place everything that appears on a normal system on the ignore list. That way it will be much easier to tell what's been installed since then.
Disabling ActiveX and ActiveScripting in your browser and disallowing mad clicking of your mouse might have prevented it from installing in the first place.
The further I get from the things I care about, the less I care about how much further away I get.