Norton AntiVirus 2004 Professional Edition Or try this one...dont know much about it but it seems to be the only one on Download.com - http://www.download.com/Anti-Trojan-Elite/3000-2239_4-10289723.html?tag=lst-0-4 Make sure u update Windows regularly too.
find the bastards with www.zonelabs.com free scanner, then delete them manually, then you know for sure they gone
Google the name of the trojan http://housecall.trendmicro.com/ is a free on-line virus/trojan scan and is better than any installed scan thaty I know