How to disable IPv6 or its components in Windows

https://support.microsoft.com/en-us/kb/929852

Be aware that unchecking the “Internet Protocol Version 6 (TCP/IPv6)” check box in the network connection’s properties (ncpa.cpl) merely unbinds IPv6 from that adapter/interface and does not fully disabled it. Although discouraged, the appropriate method of disabling IPv6 is via the registry as referenced in knowledgebase article http://support.microsoft.com/kb/929852/.

skip the video to 8:30 mark to see how to disable TCPIP 6 in action. .