Windows 7 64Bit, Crashing While Watching Movie

Hello,
I Am Having a Problem While Watching Movies!!!
Im using Xonar 1.3 Slim Audio Cards Via HDMI to A A/V Reciever then to a Projector.
Everytime i watch a movie" Avi, mkv, mpeg4....." my Computer Crashes, Loss of Sound and Signal.
I must do a hard restart, Hold Power utton down till it shuts offf. then restart to watch a few more minutes till it crashes again.
I removed the Asus Xonar Audio Card And used Hdmi via Graphic's Card to my Home Theater.
Still it crashes..
i removed this "Update for Windows 7 for x64-based Systems (KB2541014)"
Someone in a forum said so... lol
Didnt Work..
I Downloaded Diffenerent Codec's. Klite, and Windows 7 Codec Pack.
Nothing Still Keeps Crashing!!
Please Help

What processor do you have and what program are you using to play the movies?

Computer: Acer
Model: M5802-E9132
Os: Windows 7 64 Bit
CPU/Processor: Intel CoreTM2 Quad Processor Q8400 @ 2.66Ghz 2.67Ghz
Memory Ram: 8Gb DDR2
Graphics Card: NVIDIA GT220
Sound Card: Asus Xonar 1.3 Slim

I Used VLC, And Just This Morning i'm Trying WMP With Shark 007 Codec.. But now i Must goto Work, Be bac later to see if its Not Crashing With Shark007 Codec's.

VLC Crashes. Klite Crahes, And Windows 7 Codec's. Crashes too !