I attached a 10 minute long Reminder Sound file to my Outlook 2010 Beta Calendar Appointments, thinking it would be silenced as soon as I dismissed missed the Reminder. But it kept on playing for the full 10 minutes. I tried to find it and stop in Windows Media Player, I could only find the original copy of the WAV file. I tried ending it in the Task Manager, but I couldn't find it. Does anyone have any ideas on how to stop it?