I recently had an issue with playing mp4 files, so I installed ffdshow and they now play satisfactory, however I was told that I would also require Haali_Media_Splitter, so I downloaded and noticed that it didn't have an icon associated with it, and as I didn't know which program to use to open it I then looked elsewhere and found MatroskaSplitter-03032011, which is another Haali_Media_Splitter and is version 126.96.36.199. I have not installed the Haali_Media_Splitter and wondered if this is actually required being that all I needed the ffdshow for was to be able to play the mp4 files on either windows media player or on Nero Showtime. The reason for asking is that I have read bad reports from various people after they had installed this Haali_Media_Splitter, so I have come here for advice. If there is anything I have omitted in the quest for help please let me know. Thanks in advance. PS, I apologise if I have put this in the wrong thread!