Hi all! Newbie here. Can't find a solution to this problem anywhere. Any help would be greatly appreciated. Home Premium 64bit, Realtek HD. No problem with sound until I use Speaker properties or HD Audio Manager to set a sound effect. Then, if I try to play an mp3, WMP 12 gets a "... encountered a problem while playing the file." Other media players, VLC, MPC-HC, etc., act as though they're playing the file but there's no sound. (AND, just for the heck of it I just tried IrfanView and it will play the file and respond to any enhancements I change.) Anyway, the only way I can get the other players to play again is to tick "Disable all sound effects" under the Enhancements tab for the speakers. I'm baffled! Again, any help would be appreciated.