trojan horse

[forzamilan]

i detected a trojan horse when i scan my com with norton,it cant be destroyed,so i downloaded karpesky and scan my com again.this time i cant scan any trojan horse.however,my com become slower since that,what should o do?

[guestolo]

i detected a trojan horse when i scan my com with norton,it cant be destroyed

Do you know the file name and where it's located on the computer?

Could you also
From my signature below, download and save too a permanent folder of it's own onto your harddrive
Hijackthis 1.99.1
Open Hijackthis.exe

Do a "SCAN and Save a Log file"
A log will open in Notepad
Copy and paste the WHOLE contents of the log  here... Don't try and fix anything yet----It is all important