do you get issue like picture below?
A yellow exclamation mark is found at the Microsoft ISATAP 6TO4 adapter.
Sometimes we lose the internet connection because of an error in Device Manager, a yellow exclamation point is found on "Microsoft ISATAP" and on "6TO4 adapter".
According to Microsoft support, we can ignore this problem, the card will work properly. But the problem, is that in most cases, we lose our internet connection.
so what is Microsoft ISATAP?
According to the Microsoft site:
Microsoft ISATAP device (inter automatic tunneling protocol address of the site) is used to help companies transition to an IPv6 infrastructure. ISATAP encapsulates IPv6 packets using IPv4 header. This feature allows the customer carry IPv6 traffic over an IPv4 infrastructure. This approach enables organizations slowly migrate to an IPv6 infrastructure without having to spend much time and financial resources to convert the new infrastructure.
1.Open Device Manager (Start / Run or Windows Key + R, enter: devmgmt.msc)
2.Right-click on Adapter 6TO4
4.Then in the top menu, select "Action" / "add hardware, then" next "
5.Select "manually select from a list" /"network adapter (or network cards)" /"Microsoft"/"Microsoft 6TO4 Adapter"
6.Finally, select "finish installing new hardware"
7.Restart the PC
bacteria comment: even when u try using windows update it will not work. so u got to do it manually. :D