I have discovered a Win32:Agent trojan resident in a file on my C: drive. It is located in my Thunderbird email files section. Try as I may, I cannot seem to delete this. It appears to be growing in size. I have read a lot about this one and they refer to it as a "sleeper" trojan. How can I remove this trojan? I run Firefox, Thunderbird as email client, XP Pro, Avast & AVG 7.5 Internet Security System, Zone Alarm Pro, along with Spy Bot S&D and Spyware Blaster.Can anyone help with this?Thanks