I had this very same problem for weeks,I tried just about every
thing surggested here,too no avail.
But I might now have the answer.Try going to http://oz.msie.tv
and click the uninstall link,this will download a very small
program.
After I ran this I ran Adaware and it only found 2 of the original 8 remaining registy entries which it was able to delete.
I hope this is of some help.