Strange problem. When media player is started by double-clicking a file it becomes invisible, for example if I double click an AVI file the I can hear the sound but I cannot see anything. Media Player is not visible anywhere on screen, nor is there anything on the taskbar just a blank desktop with the audio playing, but Media Player does appear in task manager.
If I start Media Player from the programs menu its fine, the issue only seems to occur when files are double clicked.
Media Player 11 on Vista Business.