I never, _ever_, use IE unless I have to. This leak appears to be caused by the simple presence of IE. That is, you experience it when IE10 is installed, whether or not it is actually running in memory at any given moment. Since IE is kind of part of the
O/S as we well know... ;)
I am aware of that, being that I'm the first person in this thread who shed light on that fact that it was Internet Explorer. Since the nsi.dll and nsisvc.dll files remain unchanged regardless of the version, it is very likely to be caused by how the service
interacts with one or several of IE's core components.
My suggestion was simply that people should perform a fresh install and leave the system running IE 8 or 9, as I have a feeling that certain components are not rolled back when you bounce from version to version.