Help me Trojan files just keeps recreating

Norton 2010 keeps finding Trojan files over and over in c:\windowx\

 

Source:
  rollback.exe

    file created:

        32bp.exe

 

                    file created:

                           rollback.exe

 

What am I going to do? It has been like this now for 1 week  Norton auto-project keeps telling me it findes "trojan.gen".