Blender 2.68 won't start.

I used Blender for few months already and today it suddenly ceased to respond. When I try to open Blender nothing happens except console window showing for a moment. I tried to copy Sverchok Add-on to addons folder, but I don’t think it might be a reason of this issue, since I’ve reinstalled Blender and it did not help.
Anybody knows how to solve this issue ?


Nevermind, It occured that I messed something with graphic card drivers.