Playing MP4 files

[touri]

Only recent downloads are appearing as MP4 files, before they were windows media files.
Now after downloading I cannot play them in Windows media player.
Any suggestions?

[touri]

All sorted
Downloaded some codecs

[deathr0w]

Here is a link to K-lite Codec pack if anyone else has any else needs to update their codecs.

http://www.codecguide.com/download_k-lite_codec_pack_basic.htm