I you haven't already, I would probably give up on trying to run a current IE version, and just start using Chrome or FF- both of which IMO are much better.
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... ;)