WinXP logoff script

One my users has gotten a logoff script on his machine that is not supposed to be there.

I have looked in group policy editor, but there are no logoff scripts there.

This script is going out and looking for a server that was at one of our client locations, of course not finding it, and failing. It then displays a splash screen with the client’s coporate logo and network information.

Any clues where to begin looking for this script?