Cortana may not be as popular as Microsoft was hoping for, but it can be useful. No longer do you need to be next to your computer to perform a task; you can shout it from the other side of the room. However, there are some things Cortana can’t do out of the box.
Thanks to Windows 10’s Fall Creators Update, for example, Cortana can now shut down, restart, lock, or sign you out of your PC. Just say “Hey Cortana, shut down my PC”—it’s that simple. It can’t, however, put your PC to sleep, which is the one thing I really would like to do with my voice.