Sometimes due to incompatible with IPv6 software, like Checkpoint Secure Client, the Windows IPv6 stack is broken. The virtual IPv6 interfaces (ISATAP, 6to4, Teredo and IP-HTTPS) stop working.These interfaces are needed by technologies like Direct Access to work.

Use this troubleshooting pack when you have errors like Failed to open tunnel adapter or Interface creation failure.

If, even after uninstalling incompatible software, the IPv6 transition technologies interfaces are unusable, run this troubleshooting pack.

Reset IPv6:

• Uses the Windows Troubleshooting platform.
• Uninstalls and install again all Teredo, 6to4, IP-HTTPS and ISATAP devices.
• Resets the IPv6 stack to default settings.
• Triggers a full group policy update.
• Works in x86 and amd64 of all editions of:
• Windows 7
• Windows Server 2008 R2
• Windows 8
• Windows 8.1
• Windows Server 2012
• Windows Server 2012 R2
• It's currently only in English but is capable to fix issues in all operating system languages.
• Requires administrative privileges.