Microsoft Windows 10 is a free upgrade for Windows 7 and Windows 8 users, and will be a more familiar experience to longtime Windows users. The Start Menu is back, and it will carry over your pinned apps and favorites as well. Instead of having one interface for desktops and tablets, Windows 10 will adapt itself accordingly, so its optimized either for touch or a mouse pointer.
Multitasking is improved in Windows 10. You can snap up to four apps into place and see all open tasks at once. It allows for multiple desktops too, so you can group similar windows into separate spaces.