Cortana is ready to help you easily find and change your PC's settings. There's no need to hunt through Settings —just open Cortana and use voice or text to open Settings and make changes.
When you turn on Voice activation, Cortana will respond when you say the wake word. Cortana can open any setting for you. For example, to open Bluetooth settings try, "Cortana, open Bluetooth settings." Cortana can also open apps on your computer. For example, say something like "Cortana, open Word."
How to turn on Voice activation Windows 11
Go to Settings > Voice activation
Select Voice activation privacy settings
Turn on the toggle for Microphone access
Turn on the toggle for Cortana
Cortana in Windows 10
If you're on Windows 10, May 2020 Update, and have updated to build 19041.329 or later, you can use the wake word with Cortana. For earlier builds, you can still tap on the microphone button to use your voice with Cortana. In Windows 10, November 2019 Update and earlier versions, you can activate "Cortana" mode by opening Cortana, selecting Settings then Talk to Cortana. Under Hey Cortana switch the toggle to on.