Trojan.ZeroAccess!inf6 removal PLEASE HELP on XP

It appears that I have contracted the Trojan.Zeroaccess!inf6 virus.  Can somebody help me out on how to get rid of this thing? It seems as if this virus is multiplying and Norton cannot remove it.  I am on Windows XP Home Edition, 2002 Version Service Pack 3.

Please help!!

Thanks in advance.

Jim