This behavior happens again after some time. Then if I uninstalls the K-lite and installs it again, video starts playing both in my application as well as native WM Player. At that time I checked whether it plays in actual (native) windows media player or not but it does not play in it also. But after sometime some videos stops playing in both the components. Now, the problem is that after installing the k-lite and my application everything works perfectly (All videos plays perfectly). I am using K-lite codecs full pack so that all these formats can play in the player. The video formats are almost all the leading formats like wmv, avi, mpg, mpeg, mp4, mkv, flv, mov, vob, 3gp. Then application starts the playing videos one by one from predefined local directory. When application starts user selects either WMP or Media Element to play the videos. I have a C# windows form application in which I am playing videos one by one using WMP activex object and WPF MediaElement (I have included it using element host into windows forms).

K lite codec player