Unknown executable in Task Manager

Hello, my user has had huge problems with Spyware and Viruses. I have removed most of them and I am trying to identify this exe. tcpkb.exe. I Have been unable to identify it. Also why does it re-appear after it has been stopped using MSCONFIG? It re-appears almost immediately. My user is running WinXP Home SP-1. She is connecting to the internet via Netzero.