Docker Toolbox fails with BlueScreen on Windows7

Hi,
I launch the Docker Quickstart Terminal, the output:

      ...
      (default) Creating VirtualBox VM...
      (default) Creating SSH key...
      (default) Starting the VM...
      (default) Check network to re-create if needed...
      (default) Windows might ask for the permissions... (I have granted them)
      (default) Found a new host-only adapter: "VirtualBox Host-Only Ethernet Adapter#2"
      (default) Windows might ask for the permissions... (I have granted them)
      (default) Windows might ask for the permissions... (I have granted them)
      Blue Screen

I have Win7 64bit SP1, DockerToolbox-1.11.1b.

Could you please help to fix that?