Could be, if wifi works fine. A good quality cat 6 cable or try plugging into other ports on the router.
Another possibility maybe the ethernet card in the pc. Its settings or a fault with the card/port on the mobo ??
Oh, didn't read it correctly. missed the norton 360. That will disable windows defender anyway when installed, so yes as Ralston suggests disable norton firewall.
@Ralston18, thx for picking up on that. Bit of brain lag. 🥱
Can you post a pic of the player with the menu open ( click the 3 horizontal lines-menu) top right-under the screen display.
You can install Windows Media Player and use it to add sonhs to the mp3 player music library.
https://www.thewindowsclub.com/where-is-windows-media-player-in-windows-10...