There's a detailed article discussing the feature here: http://blogs.msdn.com/b/b8/archive/2011/12/16/signing-in-with-a-picture-password.aspx http://blogs.msdn

There's a detailed article discussing the feature here: http://blogs.msdn.com/b/b8/archive/2011/12/16/signing-in-with-a-picture-password.aspx http://blogs.msdn.com/b/b8/archive/2011/12/16/signing-in-wit... The important thing is that this feature is completely optional and can be disabled in organizations by group policy.