I hear you can actually buy memory managers (apparently the one that comes with Windows is very basic) that do all sorts of stuff. They\'re meant for coders, because it can give you all sorts of information about how much memory your program is using, how much it didn\'t release, etc.
I\'d bet with all those fancy features, they\'d have some kind of memory-clearing capability. Of course, I think the run around a couple thousand dollars...