on-search.com

Has anyone come across this hijacker? I had about:blank and when I got rid of it; this little gem popped up. I have gotten everything else off, but this one just keeps replicating itself. I purge the registries, clean the system.ini, lock the default page setting and within three or four restarts it's back. I have checked with every virus encyclopedia sites I know of and they seem to know nothing about it. I can tell you it is owned by a P.O. box I believe is in Europe. Can anyone help?