IPv6 is the imminent next evolution of the Internet protocol, but it can cause problems with legacy equipment and DNS in certain environments. Disabling IPv6 is an easy way to fix certain network issues with Windows machines. If you're not experiencing problems, there's no reason to disable IPv6. Otherwise, it's easy to turn on and off by editing the Windows registry. Let's check it out.
Unfortunately, IPv6 isn't disabled by editing the properties of a network adapter. Simply unchecking the box doesn't work. A registry hack is needed (This also works with Window 7).