Windows 10 preview lets Cortana play music, turn off your PC

Cortana is the star of a big new Windows 10 Insider Preview build. Microsoft says that voice control of your PC was one its "top requests," so the latest update now lets you shutdown, restart, lock or sleep your system using the voice assistant. You can also use natural language to play music on two apps (iHeartRadio and TuneIn) by saying "Play Drake on iHeartRadio," for instance. Once the music starts, you can use your voice to control playback and volume. If you request a song or genre without specifying the app, it'll remember the last one you used and play it from that. It also lets you find a track name from any music app by saying, "hey Cortana, what song is playing?"