Windows 10 is the best operating system that's come along from Microsoft in a long time. It's a shape-shifter that changes its interface depending upon whether you're using a traditional computer or a touch-based one. It undoes the damage wrought by Windows 8, including eliminating the awkward Charms bar and bringing back the long-mourned Start menu. A lot more has changed as well, with a new default browser called Edge, the integration of the Cortana digital assistant and plenty more.
Whether you've upgraded to Windows 10 from Windows 8 or an earlier version of Windows, or if you've got it on a new PC, this cheat sheet will get you up to speed on it. I'll cover everything you need to know, and I've also provided quick-reference charts listing useful keyboard shortcuts, touchscreen gestures and touchpad gestures.