to make sure that trojan is realy gone, you have to check what programs are started when you boot your box. Under w2k you don't have nice utility called msconfig.exe so you have to do it manualy. Troyans often use registry key HLM\SOFTWARE\microsoft\windows\current version\run , also you could check what services are started in Computer Management.
Be carefull, you can easiely delete something that is needed for your system to run properly. search for fuzzy names.