all i would say is that if its a windows media player problem try uninstalling it in ad remove programs and reinstall it again from the microsoft site after downloading the full install file. dont use windows updates as this could have been your problem. this should solve it.
the link to the download is
http://www.microsoft.com/windows/windowsmedia/9series/player.aspx
hope this works
the link to the download is
http://www.microsoft.com/windows/windowsmedia/9series/player.aspx
hope this works