Quote - Try deleting the custom default blend file b25.blend(in the .blend folder) and restarting blender.

Hmmm... No .blend fldr, no b25.* file :0 What`s wrong?! 

Using http://www.graphicall.org/builds/builds/showbuild.php?action=show&id=877
DO you think a graphics card or its drived could crash an app on start?