What exactly does KB2952664 do?

So you would rather M$ make a new KB... for us to keep track of too and keep the other KB.. hidden ?

I have thought a lot about this and I believe that Microsoft's behavior is getting close to a sign of desperation. 

They would have never acted this way in the old days when all was rosy and anyone who thinks that they are doing this for the "good of the internet" is naive. They are doing it for themselves.

It's sad for me, because I've been using Microsoft products practically all my adult life and to see it come to this is sad. The only thing I will really give Microsoft credit for is that I believe that they really did try to adopt the company to the new world of "mobile and devices" and it simply hasn't worked. That is more than can be said for companies like Oracle who is still in the 1990's. So from that standpoint Microsoft deserves some credit.

I don't know why M$ unhiding an update is really a problem most people if they don't want 10 or other 10 telemetry updates can and should be reviewing updates before downloading and installing them.

Aside from it simply being duplicitous, the problem for users who take the time to research an update and subsequently choose to hide it is that it is an annoyance for the same update (albeit a newer version) to reappear. If I do not want a particular piece of nagware or spyware, I do not want the revised version of the same.

The problem for MiscroSpy is that their increasing underhandedness in this area is becoming more apparent to more users. The growing awareness of these practices and consequent mistrust of Windows Updates is already causing the strategy to backfire - like many, I accepted all "important" updates without question for years, but no more, ever. I do not accept a single update without looking into exactly what it does and whether I really need it, and when in doubt, I leave it out. Also like many, when these underhanded tactics became apparent, I reviewed all previously installed updates and removed any that were suspect.

As for Windows 10, a whole lot of folks (myself included) who had been interested in taking a serious look at it have lost interest because of the forced updates. Microsoft may believe it has a captive market, and among market segments that don't really care about such esoterica as privacy and having a say over what happens on devices one owns, maybe it does. But the rest of us will find alternatives when we have to.

The moment a company believes itself to be invincible is the moment it begins the process of proving itself wrong.

Caveat emptor indeed.

Yep well M$ considers it a different update because it has been updated = new version

I don't know why M$ unhiding an update is really a problem most people if they don't want 10 or other 10 telemetry updates can and should be reviewing updates before downloading and installing them.

Just common sense otherwise go on automatic and go with the flow :)

Or be proactive and administrators and choose for yourselves ;)

This the list of 10 related updates I choose to not download and install

I do have others relating to Remote desktop features/ crazy fonts and time zones/... ;)

"Hiding is the first step"

But it doesn't help because Microsoft automatically unhides some of the hidden updates. Eg. KB3035583!

Please, read the whole thread KB3035583 Installing Windows 10 using Windows Update?.