I understand that, like me, a considerable number of people have a problem with WMP. For no apparent reason mine just stopped working and would not respond - except to report an error. However I never found the cause but in my case, after much time and confusion, I did a right click on the icon and clicked on "Run as administrator" and hey presto the application opened and now opens in the usual way by a single left click on the icon. Now there may be those of you who say it's obvious but it wasn't to me or to the boffins at Microsoft. Hope this helps anyone with the same problem.
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