Freazing at loading screen

There's no firmware upgrade - I believe you have to uninstall windows media player 11 to use this model of mp3 player, but it's too late for that now, b/c it has already become corrupted.

Try this: disconnect the player from the computer, turn it off, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard