In Windows 10 Full Screen covers Windows 10 Taskbar
One of the things I abhor (yes abhor) about Mac computers is that the apps at full screen cover EVERYTHING making things hard to use. Adobe Illustrator now behaves that way. A Maximized window should NOT cover the taskbar. If I wanted a Mac I'd buy one. I don't want Windows 10 Apps to behave like they are on a Mac.
Sara Bentley commented
That sounds like a windows issue and not an illustrator one. I am using windows 7 and when i full screen it still shows my bar at the bottom of the screen.