How to uninstall the IPv6 protocol from Windows XP or Windows Server 2003

For the IPv6 protocol for Windows XP with SP1 or later or Windows Server 2003, do the following:

• Log on to the computer with a user account that has privileges to change network configuration.
• Click Start, click Control Panel, and then double-click Network Connections.
• Right-click any local area connection, and then click Properties.
• Click Microsoft TCP/IP version 6 (for Windows XP with SP2 or later or Windows Server 2003) or Microsoft IPv6 Developer Edition (for Windows XP with SP1), and then click Uninstall.
• When prompted to confirm the removal of the Microsoft IPv6 Developer Edition or Microsoft TCP/IP version 6 protocol, click OK.

Alternately, from the Windows XP or Windows Server 2003 desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt. At the command prompt, type netsh interface ipv6 uninstall.


To remove the IPv6 protocol for Windows XP with no service packs installed, do the following:

1. Log on to the computer with a user account that has local administrator privileges.
2. From the Windows XP desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt.
3. At the command prompt, type ipv6 uninstall.

Unlike Windows XP and Windows Server 2003, IPv6 in Windows Vista and Windows Server 2008 cannot be uninstalled. However, you can disable IPv6 in Windows Vista and Windows Server 2008 by doing one of the following:

• In the Network Connections folder, obtain properties on all of your connections and adapters and clear the check box next to the Internet Protocol version 6 (TCP/IPv6) component in the list under This connection uses the following items.
  
  This method disables IPv6 on your LAN interfaces and connections, but does not disable IPv6 on tunnel interfaces or the IPv6 loopback interface.
  
• Add the following registry value (DWORD type) set to 0xFF:
  
  
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\DisabledComponents
  
  This method disables IPv6 on all your LAN interfaces, connections, and tunnel interfaces but does not disable the IPv6 loopback interface. You must restart the computer for this registry value to take effect.
  

For people who do not want to completely disable ipv6 You can also disable ipv6 in just firefox. Since I never use anything else this has worked for me.

1. Open up firefox.

2. In the url bar type 'about:config'

3. You will see a little thing warning you to be careful about yopur warranty. Click OK

4. In the filters bar type 'ipv6'

5. Highlight and Right click on 'rightclickdisableipv6' and select toggle until the value is set to 'true.'

6. You're done!