trojan or worm problem

I have aproblem with a worm/trojan. The beast is on a Win 2K pro machine. Installed is Nortons(updated) Spybot S&D Zone alarm is also installed now, the machine got hit before I installed Zone alarm. It pops upwarnings about corrupted registryor files there was 4 to start, now there is aout 10. The first ones were from “Microsoft” with adiffernet www. address. Some of the ones are:
www.registryfixerpro.com
www.sys32.win.com
www.regpc.pro.com
www.patchupdate.com
www.fixwin32.com
www.msreg.com
They all have the same form. I tracert them several have the same ip. Spybot didn’t find adware didn’t find it Nortons same I need help Please