What exactly does KB2952664 do?

Globally! Regions like USA & Canada, EU, Australia, China, Russia could start the things moving...

Personally, No.  This is Windows as a service.  Not a sold product per se.

Do you think there is any way to get Microsoft to court for what they're doing with us?

Microsoft was embarrassed by customer's lack of acceptance for Vista and Windows 8. Microsoft failed to LISTEN to their customers. Microsoft produced versions of Windows that we did not want with features we did not need. Customers rejected those versions.

Now comes Windows 10. Perhaps Microsoft does not want to be embarrassed by customers again rejecting a version of windows that we do not want or need.

One way to avoid having customers reject Windows 10 would have been to actually listen to customers and give us a version of Windows we really want. But apparently, Microsoft does not want to use that method ... instead they appear to be avoiding transparency regarding Windows Updates whose sole purpose seems to be nagging customers into installing Windows 10. And if we try to hide these "nag" Updates, Microsoft unhides them in an attempt to get them installed (regardless of their customer's wishes).

In addition to releasing, re-releasing, and re-re-re-releasing "nag" Updates, it also appears that even in cases where customers do not respond to the nagging (i.e., those customers who do not want to install Windows 10), Microsoft still (in some cases) downloads the Windows 10 installation files. The files total approximately 3 to 6 Gigabytes; the unrequested download uses up network bandwidth and uses up hard disk space when stored on customer's computers. For more info on the huge Windows 10 installation files being downloaded without permission, see http://www.infoworld.com/article/2983777/microsoft-windows/how-to-clean-the-windows-10-crapware-off-your-windows-7-or-81-pc.html

Why would Microsoft download Windows 10 installation files to customers who have not asked for them???? Well, perhaps Microsoft is counting each occurrence of these unrequested downloads as a "Windows 10 installation".

So, when Microsoft releases a statement as to how well customers are accepting Windows 10, perhaps those numbers include cases where customers have received an unrequested download of the Windows 10 installation files.

Rather than resorting to these kind of tricks to boost the numbers, Microsoft needs only to do one thing to get customers to accept a new version of windows ... LISTEN to customer feedback, be transparent about the purpose of Updates, honor customer's request to hide specific Updates, do not force customers to accept/install all Updates (let customers choose which Updates to accept and which to reject), do not send any telemetry data back to Microsoft without customer's explicit permission, and give us a Windows version that meets our needs. For more information on how Windows 10 is snooping, see http://windowssecrets.com/top-story/attempting-to-answer-whether-ms-is-snooping/

Microsoft Fixit saved the day.  Ran Microsoftfixitsidebaron.msi and got it back. 

Now, if I could just restore the TV and Movies Guide in Media Center, I'd be a Happy Camper. 

Of course, like everyone else, I'd be even happier if Microsoft would quit playing secret squirrel all the time.