Win7 prompts for the exclamation mark device "Teredo Tunneling Pseudo-Interface" in Device Manager

Knowledge Point Analysis:

Teredo is an address assignment and inter-host automatic tunneling technology that helps users establish IPV6 unicast connections when Ipv6/ipv4 hosts are located behind one or more IPv4 NAT. IPV6 packets are sent as UDP messages based on IPV4.
The exclamation point device "Teredo Tunneling Pseudo-Interface" appears in Device Manager because the operating system does not correctly identify the driver, which is typically installed on a ghost operating system, and the Win7 operating system does not appear.

Operation Steps:

First try to remove the original driver to allow the operating system to recognize, the best computer processing network status, the following methods:
1. Open command prompt using admin account;
2. Enter netsh and press ENTER;
3. Enter int Teredo and return;
4. Input set state disabled and enter;
5. Then open the Device Manager and uninstall the "Teredo Tunneling Pseudo-Interface";
6. Re-enter the command prompt with the administrator;
7. Enter Netsh and return;
8. Enter int IPv6 and return;
9. Enter set Teredo client and carriage return;
10. Open Device Manager---View---show hidden devices.
11. Open Device Manager and scan new hardware.

If the above method is still unresolved, reinstall the operating system through the CD-ROM to resolve.