Ever tried to remove IPv6 from Windows 2008? It can’t be done through Network Connections. You can uncheck/unbind it from your NIC but to completely disable IPv6 functionality, you’ll need to set this registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6Parameters\
Create DWORD32: DisabledComponent
Value: FFFFFFFF
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