www.makemkv.com

I also had crashes with VLC when playing Blu-ray (mkv-)material. MediaPlayer works (Windows 7, 64 Bit). Also have good results with "PowerDVD 10" from Cyberlink.

Had the same problem and in my case it definitly helped to uninstall DivX. Thats by the way software nobody needs anymore. There're many examples like divX when CEOs take over a company and only the money counts. RIP "divX", "Nero", "Real" and so on.