I had the same problem as you. All other programs worked and played sound fine Real Player, ITunes, etc. I have a Sound Blaster Live 24 bit, sound card though. The only way I got sound was to go into the Options of WMP 10, choose Devices, and then Speakers. When I choose my sound card thats when NO sound would work, but when I choose Default DirectSound Device it works fine. Weird problem.
