IPv6 is the latest address protocol. By defaultWindows 7 enable Ipv6. Here is howto disable Ipv6:
Click Start button --> type regedit in the box and press Enter --> in the registry editor window, navigate to
HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > services > TCPIP6 > Parameters
--> in the left sidebar, right click Parameters to create a new DWORD (32-bit) Value --> name it as DisabledIpv6 and set its value data as 0 --> click ok button --> then restart your computer.
