Refer to : http://forums.techguy.org/networking/289768-solved-you-might-not-have.html
With ENU os, you should got this error: You might not have permission to use this network resource
解决方案: 1. 开始->运行->regedit 2. 到这个位置:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa 3. 设定右边名为"restrictanonymous"值为0, 设定名为'limitblankpassworduse'键值为1 you can test it.