internet connection sharing has been disabled by the network administrator

Start > Run > gpedit.msc

Locate;

Computer Configuration/Administrative Templates/Network/Network Connections

Disable the following policies;

Prohibit installation and configuration of Network Bridge on your DNS domain network

Prohibit use of Internet Connection Firewall on your DNS domain network

Prohibit use of Internet Connection Sharing on your DNS domain network

Require domain users to elevate when setting a network’s location

Start > Run > regedit

Locate;

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Network Connections

Add/update a registry DWORD entry for the following, and set it to 1;

NC_PersonalFirewallConfig

NC_ShowSharedAccessUI
refer http://www.shadowsplace.net/1242/windows/internet-connection-sharing-has-been-disabled-by-the-network-administrator-windows-8/