If you don't use Cortana, Microsoft's voice-activated personal assistant, you're missing out on some handy, hands-free functionality -- especially now that she's fully integrated into Windows 10, and Windows 10 is everywhere. Like Apple's Siri and Google's Google Now, Cortana is an intelligent personal assistant who can help you with everything from launching applications to scheduling appointments. She can even adjust a handful of device settings, such as toggling your Wi-Fi on and off. Microsoft hasn't published a full list of Cortana commands, so we pulled together this unofficial list of all the things you can ask or say to Cortana on Windows 10 devices.