I downloaded an MPEG movie, it's about 120MB in size. And when I try to play it using the Windows Media Player, the running time only shows 2 minutes when it should be a lot longer. It would play smoothly for the whole 2 minutes, but then it would freeze. The audio is still working but the video won't move any longer.

Can anyone help me out with this problem? Is there anything I can do to fix this or maybe download a different media player that would play the whole movie with no problem? I'd appreciate any help. Thanks!

Try this media player, it plays pretty much every format out there:
http://www.videolan.org/vlc/