WINDOWS 2000 VIRUS

I HAVE BEING USING WINDOWS 2000 FOR SOMETIME NOW.RESENTLY IT IS NOT FUNCTIONING WELL. ALL THE ICONS ON THE DESKTOP GET FUNISH AND ALL THE FILES IN THE PROGRAM FILE FOLDER. WHEN I CONSULT A FRIEND HE TOLD ME IT A NEW VIRUS THAT HAS SURFACED AND AFFECTING WINDOS 2000 AND WINDOWS XP.
PLEASE I NEED HELP FROM THOSE GEK AND GURUS IN THE HOUSE TO POST GOOD IDEAS OUT.
THANKS.