WOW if VLC can't play it ... then I am suspicious about the file. Or about something with your system settings. Maybe someone else has ideas .. sorry. Tried rebooting? How about defragmenting your drive ... that can make a big difference since video requires fast reading from the hdd. A fragmented HDD slows reading from the drive down, & can slow your whole computer down. Try defragmenting your drives/partitions. Also try moving your file to another partition before opening.

You might be right about my computer , I just copy the movie onto a external drive and use it on another computer , It was ok with that computer using WMP , I am going to try a reimage option now on this comp and see if everything is ok , let you know in a few minuts , Thanks

Well I made an clone image and everything seem to be working good again , Though I'm curious when and how my files got corrupted ? Thanks any ways for your help and the link for that player which I am now using