Backdoor.Trojan

A client of mine has told me he has the Backdoor.Trojan 'virus' on his
system (WinXP Home) being reported by his anti-virus program. He is using
NAV 2002 as his anti-virus program. He has told me that he has been
regularly updating NAV. I will be going to his home tomorrow (22 July) to
attempt to get things straightened out for him.

Here's my question (or questions):

1. I've Googled and visited the Symantec website to familiarize myself
about the Backdoor.Trojan 'virus'. From what I've read, it seems that
Backdoor.Trojan refers to a group (or family) of Backdoor virii. Is this
correct? Or, is there in fact a virus named Backdoor.Trojan and I'm just
too stupid to pick up on it?

2. If there is in fact a virus called Backdoor.Trojan, is there a removal
tool available? If so, does anyone know where I can dl it? I'm able to
find removal tools for other Backdoor-type virii (for example,
Backdoor.Autoupder), but can't find one for Backdoor.Trojan (which is
something which leads me to believe Backdoor.Trojan refers to a group of
Backdoor-type virii).

3. Does anyone have any suggestions/ideas that might help in cleaning this
Backdoor.Trojan?


Thanks much!

Loren