Troubleshooting for local Connection redundancy

Resolve "Local Area Connection" redundant failure

Generally, a network card is configured for each installation of the computer, then in the Network Connection List window should have a corresponding "local connection" icon appears, if the computer has more than one network card installed, then we should be able to see multiple "local connection" icon appears, and each "local connection" Should be followed by numbers like "2" and "3" to correspond to the number of network adapters.

In fact, sometimes we have only one network card installed in the computer, but the Network Connection List window is still likely to appear two "local connection" icon, then why this phenomenon, how can we solve the fault?

If there is only one network card in the computer, but the two "local connections" icon appears in the List window of the network connection, it indicates that the current NIC driver is installed at least two times on the local computer, which often occurs after we change the slot position of the NIC. Generally speaking, when the network response is not as sensitive as normal, we often like to open the computer chassis, to try to install the network card from the original slot to the other slot, in order to improve the network card and slot reliability; When you adjust the installation location of the network adapter, We did not uninstall the original NIC driver before changing the location of the NIC, but the Windows system still prompts us to reinstall the NIC driver at the new location after the change in the network card location, especially for those network cards with Plug and Play enabled Windows often does not prompt us to automatically reinstall the driver for the NIC, so that the driver for the same network card device may be repeated two times by the system.

The original driver of the NIC was not unloaded in time, therefore, the driver of the NIC after the replacement location is still in the Windows system, and the driver of the NIC is installed once after the replacement location, considering that a local connection has already appeared on the local computer, so the "local Area Connection" appears after Icons to avoid duplicate names tend to automatically add numbers such as "2", "3" after the name.

Obviously, this kind of NIC is repeated installs the phenomenon often can bring us the trouble, for example, if we have already set the IP address for the network card device, when the network card installs the position change after again tries to set the same IP address for this network card, Windows system will automatically pop-up prompts, Tell us that the current IP address conflicts with other network card addresses, and requires that we have to reset the other IP address to the NIC, so we can not continue to use the previous IP address. But when we have only one IP address available at hand, how can we eliminate the IP address conflict hint? In fact, it is very simple, we can follow the following steps to remove the previously installed virtual network card device:

Click the start/Run command to open the System Run dialog box, enter the string command "cmd", and then click OK to switch the system running state to MS-DOS command line mode;

On the DOS command line, the input string command "set Devmgr_show_nonpresent_devices=1" (as shown in Figure 2), and the Windows system automatically displays all virtual devices that are hidden in the computer when the return key is clicked;

Figure 2

Then at the DOS prompt, continue to enter the string command "Start Devmgmt.msc", click the Enter key, go directly to the system's device list interface, and then click the View/Show hidden devices menu item in the menu bar of the interface. We can find the virtual NIC device in the list interface "figure";

Now double-click the virtual device icon, enter the device's property settings interface, click the Driver tab in the interface, and then click the "Uninstall" button on the corresponding tab page to remove the previously installed virtual NIC device from the computer system. This article is published in http://bianceng.cn (computer science)

Of course, if we are familiar with the system registry, you can also open the system's Registry editing window, then click the Edit/Find command in the menu bar of the window, and then enter the "local connection" keyword in the lookup dialog that appears, to search for all the local area connection values; Save the required "local connection" key values, remove all other items, and finally close the Registry editing window and restart the computer system, which will also smooth out the original NIC device completely.

When the virtual network card device is uninstalled, when we open the Network Connection List window again, we will find that there is only one local connection icon left in the local system, then we can reassign the original IP address to the NIC device after the replacement location. Edit reminder: Some software or hardware drivers will also virtual their own network card, so it is not necessarily the repeated installation of the network card caused.