What exactly does KB2952664 do?

I also only use IE if I have a problem with my default browser (Firefox), and even then just to check whether the problem is with Firefox or the website I am having trouble with.

I have no problem ignoring ALL updates to IE11, and when I do have to use it, doing so in a sandbox.

With a few exceptions, Microsoft is no longer supporting back-level versions of IE. Only IE 11 is supported.

Even if you never use IE 11, it is important to keep it up to date and install security patches for IE 11. The reason for this is that IE  is built in to the Windows operating system, and all versions of Windows (7, 8, and 10) use various functions of IE (regardless of whether you use IE as a browser). So to keep your version of Windows protected, you have to keep IE up to date. Microsoft knows this, and thus appears to be using IE security updates to pull in non-security updates that will coerce the installation of Windows 10. Ugh!

I also only use IE if I have a problem with my default browser (Firefox), and even then just to check whether the problem is with Firefox or the website I am having trouble with.

I have no problem ignoring ALL updates to IE11, and when I do have to use it, doing so in a sandbox.

My concern is that MicroShove has now crossed a very clear line, and will no doubt be using Windows security updates as trojan horses with increasingly vague mentions of "nonsecurity-related fixes" which will become "other critical issues." Because, after all, getting folks onto Windows 10 whether they want it or not is critical to MicroShove's plans.

It is starting to look like the day I will start using my Windows 7 computer offline only (and something Linux-based online) will come sooner than I thought. Oh well, it's been a decent run for a couple of decades (a few if you count DOS), but all things must pass...

The last reply brings up a related security problem.  Adobe Flash Player has lots of patches, and I try to check daily to see if Adobe has released a new patch.  I do this on my Windows 7 desktop.  I also "babysit" a Windows 8.1 laptop for a genealogical society, and for IE 11, flash is built-in.  If Adobe releases a flash update, it will not be installed in 8.1 IE 11 until the next patch Tuesday release.  That makes IE 11 users vulnerable to flash problems.  In fact, I just checked, and there is a new patch to Adobe flash.

Yes -- they got it that people were only accepting the security updates but either completely ignoring the others, or checking them out in details.

NOW you cannot trust them, and even security updates must be checked out.  PLUS, we are NOT ABLE to install this one because it defeats all the work we have done to keep from getting this annoyware/trickware.  So for this hack, a lot of people are vulnerable.

Basically, they now have said "accept this or be hacked".

And that is massively irresponsible.  I hope someone can convince them to back away from this and stop putting their "bug" that is windows 10 into truly critical updates.

(At least it's just IE -- I pretty much only use IE if I have a problem with other browsers.)

Seems like what MicroShove has learned from Windows 8 is not that it didn't catch on as much as they hoped because it sucked, but that it didn't catch on as much as they hoped because it was optional, and they seem determined not to make that mistake again.

Each new step in the Windows 10 strategy is a little more sneaky, a little more forceful. This latest tactic is nothing short of attacking a user's system with a trojan. Now that a lot of us will no longer accept all security updates without checking them out first, what worries me is what's next? When all of their electronic coercive attempts fail, will they send an armed team to my house to force me to Windows 10 at gunpoint?