Hi, when I open up device manager, under the network adapters tab, there is a yellow exclamation mark next to isatap.{1571B893-418B-4845-85A8-C0509A7C41CF}. When I check under this device's properties, it says "This device cannot start". (Code 10).is there any way to fix this?

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Hi, Based on my experience, the issue can occur if the network adapter is fully support IPv6. Intra-site Automatic Tunnel Addressing Protocol (ISATAP), which is an IPv6 transition technology, allows you to deploy unicast IPv6 connectivity on an existing IPv4 networking environment. Its impact on your IPv4 support infrastructure is reduced to the configuration of one ISATAP router. With ISATAP, IPv4-dependent applications continue to utilize IPv4 while newer IPv6-capabel applications can be deployed immediately. Both types of traffic will share a single common IPv4 infrastructure. If IPv6 is not required in the environment, we can safely ignore this error message since the network adapter will continue to work correctly. In addition, Ive included the following KB article for your reference: On a Windows Vista-based computer, the Microsoft ISATAP adapter appears with a yellow exclamation mark next to it in Device Manager, and you also receive an error message http://support.microsoft.com/?id=932520 Note. This article also applies to the error code 10. Hope the information is helpful. Sincerely, Joson Zhou Microsoft Online Community Support