video files are working only on Windows Media Player

[proto2]

Hi! I have a problem with playback video files. On Windows Media Player everything works ok, but only on WMP. I have tried many other programs ( i want to watch a video with subtitles) and windows cashes during loading vide files. I have installed all codecs properly and reinstalled media player. I've tried to play movies on The Playa, Power DVD and many other programs. What should i do to fix this problem?