http://social.technet.microsoft.com/Forums/bg-BG/w7itprogeneral/thread/947489ae-dc86-45f0-ad5e-463a62e1d59f
http://shammyowens.blogspot.com/2012/02/windows-2008-r2-shared-files-do-not.html
http://support.microsoft.com/kb/2646563