I have read extensivelly the documentation I have found about playing restricted formats.
I have installed the package and followed the instructions.

The thing is that (it happened just now), when I turn on my computer, I can play one or two .wmv files, but then it does not work.

Just now, I played two different files, but then the image was gone, when I tried again. And now I get the error message saying I need a codec and the codec cannot be found.

My question is, is there a procedure for cleaning some video cache or something?
I get the impression that, if it plays once, it should play more times. Is there anything I can do, when .wmv files stop playing, I mean, .wmv files that already played but stopped working?

Thank you for your time,