If you are starting to play with the new task record in AX2012 R3 there is a couple of parameters that you need to configure. This video gives you a quick run down of what to do with these

This post might be interesting as well if you are getting a message about Windows Media player while running on Windows 2012 R2 server.

https://organicax.com/2014/11/05/task-recorder-setup-media-player/

Cheers

Lachlan