In case you have an issue with turning Bluetooth on Windows 11, start with verifying that the Airplane Mode is turned off in Settings > Bluetooth & devices. In case there is no Bluetooth option at all, then it might be caused by the Bluetooth driver, Bluetooth firmware, or Bluetooth hardware. According to Microsoft, one should try looking for the Bluetooth device in Device Manager and update its driver. One may also consider shutting down the computer fully and rebooting it after. In case Bluetooth doesn’t work anyway, one should check Windows Update or the manufacturer website for updates of the Bluetooth drivers or firmware.