Today I noticed a new item in my taskbar..."Get Windows 10". Research shows this notice is the result of a "important" Windows Update KB3035583 that was automatically installed. What it does is reserve a free copy of Windows 10 when it becomes available and will automatically download it. You have the choice then to install it or not. If you do not want or like pushy stuff like this on your computer, go to installed updates and delete KB3035583.