What about a yellow exclamation mark on a computer WAN Mini port? WAN Mini Port yellow exclamation mark Solution

What is a WAN

The WAN (wan,wide area network) is also known as the remote network (long Haul network). Usually bridging a large physical range, covering a range of dozens of km to thousands of km, it can connect a number of cities or countries, or across several continents and provide long-distance communication, the formation of international remote Network.

The coverage is wider than the local area network (LAN) and the metropolitan Area Networks (Mans). The communication subnet of wide area network mainly uses packet switching technology. The communication subnet of WAN can make use of public packet switching network, satellite communication network and wireless Packet Switch network, it will be distributed in different regions of the local area network or computer system interconnection, to achieve the purpose of resource sharing. such as the Internet (Internet) is the world's largest wide area network.

The wide area network is made up of many switches, with point-to-point connections between the switches, and almost all point-to-point communications can be used to establish a wide area network, including leased lines, optical fibres, microwaves, and satellite channels. The WAN switch is actually a computer that has a processor and an input/output device for sending and receiving packets.

What to do with a yellow exclamation mark on a computer WAN mini port

To resolve this issue, uninstall the TCP/IP protocol, remove the second WAN miniport IP device, and then reinstall the TCP/IP protocol.

1, uninstall the TCP/IP protocol. To do this, follow these steps:

A. In Control Panel, double-click Network and dial-up connections, right-click Local Area Connection, and then click Properties.

B. Under "This connection uses the components selected below," Click Internet Protocol (TCP/IP), and then click Uninstall.

C. Follow the on-screen instructions to uninstall TCP/IP.

D. Restart the computer when prompted, but click No if you are prompted to allow Windows to enable a protocol.

2. Right-click My Computer, and then click Properties.

3, click the "Hardware" tab, and then click Device Manager.

4, on the View menu, click Show Hidden Devices.

5, under the "network card", should not have any WAN miniport IP devices. If the WAN miniport IP device is listed, continue with the following steps. If the WAN miniport IP device is not listed, go directly to step 16.

6, click Start, click Run, type regedit in the Open box, and then click OK.

Tip: The use of Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft does not guarantee that you can resolve problems caused by improper use of the Registry Editor. Using Registry Editor requires your own risk.

7, locate the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\CONTROL\CLASS\{4D36E972-E325-11CE-BFC1-08002BE10318}

8, on the Registry menu, click Export Registry File, type Backup-key in the File name box, and then click Save.

Note: You can revert to changes made to this registry key. To do this, double-click the saved Backup-key.reg file.

9, click each registry subkey under this key, and then view the data column of the "DriverDesc" value to determine which subkey corresponds to the WAN miniport (IP).

For example, the "0005" subkey.

10. Right-click the DriverDesc value data as a subkey for WAN miniport (for example, right-click "0005"), and then click Delete. Click Yes to confirm that you want to delete the item.

11, exit the Registry Editor.

12. Right-click My Computer, and then click Properties.

13, click the "Hardware" tab, and then click Device Manager.

14, on the View menu, click Show Hidden Devices.

15. Under Network card, right-click WAN Miniport (IP), and then click Uninstall. Click Yes to confirm that you want to remove this device.

16, reinstall the TCP/IP protocol. To do this, follow these steps:

A. In Control Panel, double-click Network and dial-up connections, right-click Local Area Connection, and then click Properties.

B. Click Install.

C. In the Select Network Component Type dialog box, click Protocols, and then click Add.

D. Under Network protocols, click Internet Protocol (TCP/IP), and then click OK.

E. After the installation of the protocol, click Close.

17. Reset the modem by turning off the power and then turning on the power supply, or, if it is a built-in modem, restart the computer.

18, test the Internet connection.