False positive with a-squared anti trojan?

My Win98 system has been rock solid for over 6 years. It started acting a
little strange lately and so I ran some tests and scans.

a-squared 2.1.0.2 free version reported the Downloader.Win32.Agent.avq
trojan in C:\Windows\Downloaded Program files\Sporder.dll.

In a Google search Counter Spy and a-squared seem to be the only programs
that detect this particular trojan so I'm wondering if this is a false
positive.

An interesting side note, there's also a copy of Sporder.dll in the NOD32
folder that was installed with that program and has something to do with
Winsock.

The copy of Sporder.dll in the C:\Windows\Downloaded Program files\ folder
isn't visible any where except in File Manager. It doesn't show up in
Search, Explorer or any AV programs. I have all files set for visible - no
hidden files.

What is the site that I can submit this file for analysis?

Chas.