That's unusual. I'm still using IE 10 on Win 7 on my main dev PC, and I've still never seen the memory leak issue. Every case, without fail, that has been reported to me where it looks like the memory leak issue, has been from someone using IE 11. I have replicated the issue on Win10/IE11 easily, but cannot on Win7/IE10.
I'm not familiar with those updates, but I wouldn't rule out some component being the ultimate memory leak cause, and it being distributed in some other update (not just with IE11). But the truth is, I just don't know.