Windows 10 nagware is best described at this website URL: http://www.techrepublic.com/article/microsoft-hides-a-windows-10-easter-egg-in-windows-78-1-systems/
It is also known as KB3035583 by Windows Update.
To learn how to remove it with step-by-step instructions, visit: http://www.howtogeek.com/218856/how-do-you-disable-the-get-windows-10-icon-shown-in-the-notification-tray/
You will need to know how to gain permission to actually delete the files and folders. Go here: http://www.askvg.com/guide-how-to-take-ownership-permission-of-a-file-or-folder-manually-in-windows/
Best of luck.