Microsoft teredo tunneling adapter - Intel Acer Aspire 4745G-432G50 14.0" Intel

See this WIki, teredo tunnelling is software to encapsulate IPv6 in IPV4 packet.
As IPV6 is now available, it is no longer required.
Teredo tunneling

Best way is probably to let reinstall them, here someone has a solution for that: http://www.tomshardware.co.uk/forum/44768-63-reinstall-microsoft-teredo-tunneling-adapter It is rather one long sentence, but I think he is right.

According to http://h30434.www3.hp.com/t5/Notebook-Operating-Systems-and-Software/Microsoft-Teredo-Tunneling-Adapter-quot-device-is-not/td-p/4090294 they said: "Right click and remove all the Teredo Tunneling Pseudo-Interface. Restart the computer. You could Update Driver Software by right clicking, browse computer for driver software. Select let me pick from a list of device drivers on my computer-> network Adapter > Microsoft > Microsoft Teredo tunneling adapter. You can turn on system restore by following this document."

Uninstall it.
Ok so sometimes this IPv4 to IPv6 shim can become a problem and in some cases it does not appear in the list of adapters where you can quickly disable it. Fortunately there is a way to quickly disable the Teredo Tunneling interface using the command line. Open an elevated command window and type the following command:
netsh interface teredo set state disabled

You can read more about 6to4 adapter commands here http://technet.microsoft.com/en-us/library/cc730854(WS.10).aspx

1. Open command prompt with administrator credentials (Find CMD and right-click - Run as Administrator).

2. Enter netsh environment. Type "netsh" and ENTER.
3. "int teredo" and ENTER

4. "set state disabled" and ENTER.
5. Open Device Manager and uninstall "Teredo Tunneling Pseudo-Interface".

6. Open command prompt with administrator credentials once again.
7. netsh + ENTER.

8. "int ipv6" + ENTER
9. "set teredo client" + ENTER

10. Open Device Manager and Scan for new hardware.
11. Select "Show hidden devices" from the View menu. You will now see that it is present without errors with any luck.

hope this helps

i get disconnected every 5 mins when im on online games... Microsoft Windows [Version 6.1.7600] Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\vaio>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : vaio-VAIO Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Bluetooth Network Connection:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network) Physical Address. . . . . . . . . : 00-26-43-FA-BD-FC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Marvell Yukon 88E8057 PCI-E Gigabit Ether net Controller Physical Address. . . . . . . . . : 00-24-BE-84-48-99 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Intel(R) WiFi Link 5100 AGN Physical Address. . . . . . . . . : 00-24-D6-3C-A4-1A DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::2565:e8a3:5e8f:4e8d%11(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.103(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Monday, May 09, 2011 6:54:42 AM Lease Expires . . . . . . . . . . : Tuesday, May 10, 2011 6:54:41 PM Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DHCPv6 IAID . . . . . . . . . . . : 184558806 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-9C-59-56-00-24-BE-84-48-99
DNS Servers . . . . . . . . . . . : 192.168.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Local Area Connection* 17:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes
Tunnel adapter isatap.{07E2F4DD-B9BA-4164-9865-1833EC48EA69}:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2 Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:8bb:234c:8f31:410a(Prefe rred) Link-local IPv6 Address . . . . . : fe80::8bb:234c:8f31:410a%15(Preferred) Default Gateway . . . . . . . . . : :: NetBIOS over Tcpip. . . . . . . . : Disabled

the yellow mark on device manager means the driver has not been installed and the driver is connected to the motherboard use your motherboard drivers CD and install them or you can download them from the net

you need to hit anything with a name like tunnell driver with a hammer

Teredo is an IPv6 transition technology that provides address assignment and host-to-host automatic tunneling for unicast IPv6 traffic when IPv6/IPv4 hosts are located behind one or multiple IPv4 network address translators (NATs). To traverse IPv4 NATs, IPv6 packets are sent as IPv4-based User Datagram Protocol (UDP) messages. This article provides an overview of Teredo—including Teredo addresses and packet structures—and detailed explanations of how communication is initiated between Teredo clients, Teredo host-specific relays, and IPv6-only hosts using the IPv4 Internet, the IPv6 Internet, Teredo servers, and Teredo relays.
more at http://technet.microsoft.com/en-us/network/cc917486.aspx

Teredo tunneling is a method of tunneling IPV6 traffic over an IPV4 network.99.9999999% of the networking in the world is IPv4 so why vista would want to change it is beyond me but yet another failing of Vista no wonder it's being replaced this year I just feel sorry for the mugs that have it and are still being sold it!

However back to your problem and a solution t's simple just do the following and you should be OK

To uninstall IPv6 from a computer using the command prompt
1. Open Command Prompt.

2. At the command prompt, type ipv6 uninstall, and then press ENTER.