Laws: The proper way to disable IPv6

Trust me, it's easy to "de-configure" and reconfigure IPv6, just use this Microsoft Fix It tool:

http://support.microsoft.com/kb/929852

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We have been getting a lot of cases on this behaviour.  When you open the command prompt and type: 

ping localhost

The result is:  ::1:

Basically, you have only done 1 of 2 steps to correctly disable IPv6. i.e. Change the DisabledComponents registry value & Unbind IPv6 from a specific network adapter.  

Just check out the Microsoft Fix It tool for further details.  Trust me, it's easy...

If you want to keep IPv6 in your network, I would check out the following workflow to swap out the IPv4 Network License Tools with the IPv6 compliant Network License Tools:

http://upandready.typepad.com/up_and_ready/2011/09/general-licensing-do-i-need-ipv6-network-license-manager-for-windows.html

Reference:

http://upandready.typepad.com/up_and_ready/2011/11/quick-start-setting-up-a-license-server.html