Alek wrote:
"This update provides updated configuration and definitions for
compatibility diagnostics performed on the system. The updated
definitions will improve accuracy and help enable Microsoft and its
partners ensure compatibility for customers who want to install the
latest Windows operating system."

Sounds like a precursor to Win 10. Do I need it?

It never hurts to toss in the KB number when you
ask a question like this. My guess is KB3150513.

*******

"This update will be offered only if KB2977759, KB2952664, or KB2976978 is installed"

http://www.infoworld.com/article/306...ing-patch.html

"May 4, 2016

Released by Microsoft without documentation, it's safe
to hide this patch if you don't want Windows 10 or its related updates"

Of course you need it! If you didn't install
it, er, ah, um... nobody would notice. So install it!

Takes off Microsoft cap and hides in bushes for next victim

Paul