This my friends (or fellow fools) is a perfect example of a script kiddie, and why you don't want to be like them. Why would you install a trojan on your computer? That's like me saying "Hey, I installed a rootkit on my server, and I got hacked." or in ratman's case "Hey, I give root access to everyone on my computer, and it got hacked, help me". You just don't do stuff like that. Also, speaking atleast a bit better (No one is perfect) might help you out a bit.)

As for fixing it, what OS are you using? Have you tried a recovery from the install CD?

Peace

MB