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If you’re running Windows Vista and Windows Server 2008 with DHCP, you’ll be likely to encounter problems if you don’t set up IPv6 properly. The fix is of course to set up IPv6 properly on the server, but there are a few workarounds if you can’t do that. You can’t uninstall IPv6, but you can, among others disable it, or configure it at will.
To disable it, clear the Internet Protocol version 6 (TCP/IPv6) check box in the properties of a network connection. You can also configure it a bit more than that. What you need to do is create a registry key and set it properly. Here’s how: