Does WIndows Media Player crash "everytime" you use it?
EG can you play mp3's in it, or any other movie files?
If it crashes all the time, I would suggest you uninstall it through COntrol panel > Add/Remove programs, reboot your computer then visit Microsoft's web site to re-download and install it.
Sometimes when I watch video clips using Windows Media Player, my computer will just restart by itself, and then a window will pop up when it shows the desktop and says that Microsoft has recovered from a serious error.
What is this??