So I had this on a machine a couple weeks ago and I ran through all the usual tools (Mbyte, CF, ADW, etc.) Nothing was working and finally someone told me to try Norton Power Eraser and that did the trick. It was a .dll in a temp hidden folder under SYSWOW64
I have another machine now with the same issue but Norton Power Eraser didn't work. The process continues to run and eats up RAM. This time I can't even manually close the process because it complains of permissions.