OP
If you had 18 real trojans- and have verified with virus total and possibly googled them and are not in a "test mode" you have a serious problem
run ccleaner or similar
run a couple of on line anti virus scans, configure to scan archives, e-mail etc
Kaspersky
Bitdefender
then a couple of other scans
since you have trojan hits try a-squared
watch for FPs in all the above
you could also try the new spybot 1.6, counterspy, spysweeper, spyware doctor
if you are still getting hits post a Highjack This (HJT) in your favorite spyware removal forum
hopefully you were running a test
submitting your hits would be very helpful
what exactly did you find?