If you don't want to get constantly nagged by Microsoft to Upgrade to Windows 10, here is a website that works easily to remedy that issue. I came back to my Office and found that Windows 10 was installed on one of my office computers that uses Quick books with an older version.. It was not compatible with Windows 10 !  WEll here is a link I want to share with you that will remove the update and also a way to disallow the update from being installed period!  http://www.makeuseof.com/tag/get-rid-windows-10-upgrade-notification-windows-7-8/

As always we are here to assist you with your technology needs if you need it!  Good luck and Stay clear of Windows 10...!!