This sounds like a precurser to AntivirusXP, I believe the smitfraudfix can detect an remove this you just need to run it in safe mode to be sure.

http://siri.geekstogo.com/SmitfraudFix.php

also you may want to look at this forum it has usefull information in it that could help you out.
http://antionline.com/showthread.php?t=277312

This link here has some info about this trojan, as well as other programs that can detect and remove it
http://www.spywareguide.com/spydet_2...ojan_zlob.html

good luck