To play music files on your computer using Cortana, you can follow these steps: 1. Navigate to the folder containing your music files. Right-click on a music file and select Open with > Groove Music. This will associate the file type with Groove Music. 2. Open your Groove Music app and ensure that your music library is up to date. 3. Say to Cortana, "Play [song/artist/album] in Groove Music." If Cortana is directing you to sign up for a music streaming service, there might have been changes to how Cortana handles music playback. By associating your music files with Groove Music, you should be able to play your local music library through Groove Music directly. If you continue to experience difficulties playing local music...