This icon leads to MS' colorful spiel for why you want to install the free Win10 upgrade.
First things first. It's obvious from my email today that this icon and MS pitch alone are confusing many users. They've never seen anything like this appear before and many think it's a virus or that their system has been otherwise compromised.
In fact, this notification is triggered by a Windows Update that MS slipped into their update stream some time ago, which the vast majority of users probably accepted without realizing what it was.
I'd go as far as saying it was KB3035583. I did the alerts and all the expected actions, just at some point I began referring to it as CWX; and wondering why it wasn't taken seriously.
C:\Windows\System32\GWX was added by KB3035583. April 4th for 24 hours it recorded your cache and actions preformed (you can view my installation of new video drivers), my HOSTS file kept the file from being sent out so I'm able to view what was collected. Everybody else in the world sent it out to a third party after it had collected what it was after.
The file in control and file sent were named the same config.xml, there were two other config.xml files which I saw as future events (I have long since removed the GWX directory), this must be one of it's actions.
It's in my journal, just always referred to as CWX instead of GWX, I have since had my cataracts removed.