Solve : Video Layer Not Working?

1.	Solve : Video Layer Not Working?
Answer» As I understand it the are a NUMBER of graphics layers...e.g. the LAYER explore is seen in, the layer with the cursor on and the layer that contains VIDEO play back. My video playback has stopped working. The audio from the files play but the video layer is missing. Videos play back does not occur in WMA, Real Player, DIVX. However video playback does occur in itunes. This is itunes sends its video play back to the same graphics layer as the explorer shell. I need to know how GET this layer working again so i can watch video in other media player because itunes in rubbish for video. Thanks.What happened before this started? What protection do you have? What OS is this? And have you tried updating the programs concerned?

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