您好，
可能由于您的防火墙阻挡了NLA相关检测， 请关闭系统和外部防火墙然后修复您的网络再观察问题情况。
相关文章：
Network Location Awareness (NLA) and how it relates to Windows Firewall Profiles
http://blogs.technet.com/b/networking/archive/2010/09/08/network-location-awareness-nla-and-how-it-relates-to-windows-firewall-profiles.aspx?Redirected=true
Why is my network detected as “unknown” by Windows Vista or Windows Server 2008
http://blogs.technet.com/b/networking/archive/2009/02/20/why-is-my-network-detected-as-unknown-by-windows-vista-or-windows-server-2008.aspx
The Network Connection Status Icon
http://blogs.technet.com/b/networking/archive/2012/12/20/the-network-connection-status-icon.aspx
谢谢。
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