To Disable all IPv6 components in Windows 2008 server, follow the below steps
- Uncheck “Internet Protocol Version 6(TCP/IPv6)
- Open Registry editor and browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
- Add New “DWORD (32 Bit) Value”
Name: DisabledComponents
Value: ffffffff
- Restart System to take effect.
Hope this helps.