A little while ago I noticed that my windows media player that pops up whenever I click on a sound clip or that loads on a webpage that I open up to play a video has reverted to the old windows media player (I have 9 or 10 now and it has reverted to one of the first ones, judging by the interface).

I didn't think much of it since it still worked fine, but now, it's not working at all.

Any ideas?

Thanks