How to troubleshoot missing network connections icons in Windows Server 2003 and in Windows XP

SYMPTOMS

When you click Start, point to and click Control Panel, and then double-click Network Connections, or if you right-click My Network Places on the desktop and then click Properties, you do not see all network icons. Or, you may experience problems with the Network Connections window.

To know which method you should try first to resolve your problem, review the following four cases to determine which symptoms match your situation.

Case 1: All or some of the network icons are missing.

•	The LAN or High-Speed Internet connection icon is missing.
•	The Dial-up Connection icons are missing.
•	The New Connection Wizard icon is missing.
•	Only the New Connection Wizard icon appears. Or, one or more dial-up connections also appear.
•	If you click the Advanced menu and then click Advanced Settings, only the [Remote Access connections] entry appears in the Connections list.

If this case describes your situation, you should first try Method 1 in the "General troubleshooting" section to let Windows automatically detect and install network adapters.

Case 2: Only the "Dial-up Connection" icons are missing.

If this case describes your situation, you should first try Method 5 in the "General troubleshooting methods" section to add a generic standard modem.

Case 3: The Network Connections window stops responding (hangs) or closes immediately after you select a network connection and then click "Properties"

If this case describes your situation, try Method 4 in the "Advanced troubleshooting" section to reconstruct the Config entry of the Network subkey. If you do not feel comfortable performing advanced troubleshooting, you may want to ask someone for help or contact support.

Case 4: The network icon disappears only after you manually connect to the network.

If this describes your situation, try Method 3 in the "Advanced troubleshooting" section to use the Group Policy Results tool or the Group Policy Management Console to diagnose and resolve the problem. If you do not feel comfortable performing advanced troubleshooting, you may want to ask someone for help or contact support.

General troubleshooting

Method 1: Let Windows automatically detect and install network adapters

Windows can automatically detect and install the correct network adapters for you. It will also correct any corrupted registry entries on the network adapter.

To direct Windows to automatically detect and install network adapters for you, follow these steps:

1.	Right-click My Computer, and then click Properties.
2.	Click the Hardware tab, and then click Device Manager.
3.	To see a list of installed network adapters, expand Network adapter(s). Click to locate the network adapter, and then click Uninstall.
4.	Restart the computer, and then let the system automatically detect and install the network adapter drivers.

Check to see whether your networking icons appear. If this method worked for you, you are finished with this article. However, you might want to read the "Prevention tips" section to learn how you can avoid this problem in the future.

If this method did not work for you, try Method 2.

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Method 2: Verify network settings and services

Network settings such as adapter settings, services settings, the logon setting, the desktop interaction setting, and networking services settings enable you to use your computer to connect to a network. If these settings are incorrect, network connectivity issues can occur.

To verify network settings and services, follow these steps:

1.	Verify that the correct network adapter is selected. A network adapter is a device that enables you to connect a computer to a network. It is also known as a network interface card (NIC). a. Right-click My Computer, click Properties, click the Hardware tab, and then click Device Manager. b. Double-click Network adapters, and then verify that the correct network adapter name is selected. If you do not know the name of your network adapter, don't worry. For now, just make sure that an adapter is selected. c. Double-click the network adapter, and then verify that the "This device is working properly" message appears in the Device status box on the General tab. If you do not see this message, click Troubleshoot, and follow the directions. d. After you confirm that the correct network adapter is selected and is working properly, you can close all the open dialog boxes.
2.	Verify that the necessary services are started. The Services settings simply direct the system to stop, start, and administer system services. a. Right-click My Computer, and then click Manage. b. Double-click Services and Applications, and then click Services. c. In the right pane, look at the Status column. You may need to expand the box so that you can see all the columns. Make sure that the following services are started: • Remote procedure call (RPC) (This service must be started before other services can take effect.). • Network Connections (This service can only start if the RPC service is active.) • Plug and Play • COM+ Event System (This service can only start if the RPC service is active.) • Remote Access Connection Manager (This service can only start if Telephony service is active.) • Telephony (This service can only start if the RPC service and the PnP Service are active.) d. To start a service, right-click the service name, and then click Start. e. Do not close the Computer Management box because you will need to check additional settings in the remaining steps.
3.	Verify the logon setting. a. In the right pane, double-click COM+ Event System service. b. Click the Log On tab. c. Under Log on as, verify that the Local System account is selected.
4.	Verify the desktop interaction setting. a. Double-click the Network Connections service. b. Click the Log On tab. c. Under Log on as, verify that the Local System Account option is selected. d. Verify that the Allow service to interact with desktop check box is selected, and then click OK. e. Close the Computer Management box.
5.	Verify the network services setting. a. Click Start, and then click Control Panel. b. Double-click Add or Remove Programs. c. Click Add/Remove Windows Components. d. Scroll down and then click Networking Services, and then click Details. Verify that Simple TCP/IP Services is turned on, and then click OK. e. Close all the open dialog boxes.
6.	Verify that the network DLL files are registered correctly. DLL files are small files that include a library of functions and data that can be shared across multiple applications. a. Click Start, and then click Run. b. In the Run box, type cmd.exe, and then click OK. c. Type the following lines. Press ENTER after you type each line. This command text is difficult to type. Be sure that you type it exactly as it appears below. Or you may find it easier to copy and paste the text instead. Click OK when the RegSvr32 dialog box appears for each command. regsvr32 netshell.dll regsvr32 netcfgx.dll regsvr32 netman.dll d. Restart the computer. Check to see whether your networking icons appear. If this method worked for you, you are finished with this article. However, you might want to read the "Prevention tips" section to avoid this problem in the future. If this method did not work for you, try Method 3.

Method 4: Use the Dcomcnfg.exe utility to reset the "Default Impersonation Level" setting

This setting tells the computer how you want it to authenticate who can connect to a network. This method sounds more intimidating than what it really is. The DCOM Config utility has a point-and-click interface, and you just need to follow the steps, and it will do the "dirty" work for you.

Before you get started, you will need to make sure that you are logged on to the computer by using an administrator account. With an administrator account, you can make changes to your computer that you cannot make with any other account, such as a standard account. If you are using your own computer, chances are that you are logged on with an administrator account.

If you are unsure whether you have administrative user rights, follow these steps. Otherwise, go to step 1.

1.

Open the Date and Time Properties dialog box. a. Click Start, and then click Run. b. In the Open box, type timedate.cpl, and then press ENTER.

2.

Now determine whether you are logged on with an administrator account. • If the Date and Time Properties dialog box opened after you performed step 1, you are logged on as a computer administrator. Close the Date and Time Properties dialog box, and then continue with this method. • If you received the following message, you are not logged on as an administrator: You do not have the proper privilege level to change the system time.

To continue with this task, you must first log off, and then log back on to Windows by using a computer administrator account. If you do not know how to log back on to Windows by using a computer administrator account, you might have to ask someone for help. If this computer is part of a network at work, you can ask the system administrator for help. However, if you have to perform this task on a home computer that is not part of a network, you must know the password for an administrator account on your computer.

Unfortunately, if you do not know the password for any administrator account on your computer, this content is unable to help you any further. You may want to contact support. See "Next steps" for information about how to contact support.

To run the Dcomcnfg.exe utility to rest the Default Impersonation Level setting, follow these steps:

1.	Click Start, and then click Run.
2.	Type dcomcnfg, and then click OK.
3.	In Component Services, click Computers, right-click the computer whose machine-wide impersonation level that you want to modify (for example, My Computer), and then click Properties.
4.	Click the Default Properties tab, and then click to select the Enable Distributed COM on this computer check box for this computer.
5.	Click the down arrow in the Default Impersonation Level box, and then click any setting other than Anonymous, and then click OK.

The new machine-wide impersonation level is available the next time that you start a program. Programs that are currently running are not affected until you restart them.

Check to see whether your networking icons appear. If this method worked for you, you are finished with this article.

If this method did not work for you, you can try Method 5.

Method 5: If only the Dial-up Connection icons are missing, temporarily add a new modem

Try adding a standard modem. Often, just the process of adding a new modem causes the connection icons to reappear. To add a standard modem, complete these steps:

1.	Click Start, and then click Control Panel.
2.	If it is not already selected, click Switch to Classic View. This option appears on the left side of Control Panel.
3.	Double-click Phone and Modem Options.
4.	Click Modems, and then click Add. The Add Hardware Wizard starts.
5.	Click to select the Don't detect my modem I will select it from a list check box, and then click Next.
6.	Select a standard modem from the list on the left, and then click Next. When the icons reappear, you can safely delete the modem that you added in this procedure.

Method 1: Verify that all Windows Protected Files in the System 32 folder are intact

System File Checker enables an administrator to scan all protected files to verify their versions. If System File Checker discovers that a protected file has been overwritten, it retrieves the correct version of the file from the cache folder (%Systemroot%\System32\Dllcache) or from the Windows installation source files, and then it replaces the incorrect file. System File Checker also checks and repopulates the cache folder. You must be logged on as an administrator or as a member of the Administrators group to run System File Checker.

To run System File Checker, open a command prompt, type sfc /purgecache, and then press ENTER. The Window File Checker starts.

Method 3: Use the Group Policy Results tool to see which Group Policy objects are applied

If the icon is being deleted only after you manually connect to the network, follow these steps:

1.	Restart the computer while it is not connected to the network to see whether a Group Policy object (GPO) is being downloaded.
2.	Start the Group Policy Results tool to find out which GPOs are applied. For more information about how to use the Group Policy Results tool, click the following article number to view the article in the Microsoft Knowledge Base: 321709 (http://support.microsoft.com/kb/321709/) How to use the Group Policy Results tool in Windows 2000
3.	Click Start, click Run, type gpedit.msc, and press ENTER.
4.	Locate and open Group policy/User Configuration/Windows Settings/Internet Explorer Maintenance/Connection/Connection Settings/.

Method 4: Reset the network connections

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 (http://support.microsoft.com/kb/322756/) How to back up and restore the registry in Windows

If the Network Connections window starts to open, but then closes immediately or "hangs," complete these steps:

1.	Click Start, click Run, type regedit, and then press ENTER.
2.	Locate and then click the following registry subkey: HKEY_LOCAL-MACHINE\SYSTEM\CurrentControlSet\Control\Network
3.	Right-click this subkey, click Export, and then save the selected branch in a file.
4.	Click the Network subkey again, and then delete the Config entry. Do not delete the Network subkey. The Config entry will be reconstructed when you restart the computer.
5.	Restart the computer. You may have to manually turn off the computer.

Method 5: Verify that the registry keys are intact and correct

To verify that the registry keys are intact and correct, complete these steps:

1.

Click Start, click Run, type regedit, and then press ENTER.

2.

Locate and then click the following registry subkey: HKEY_CLASSES_ROOT\Interface\{0000010C-0000-0000-C000-00000000046} Verify that the subkeys NumMethods and ProxyStubClsid32 exist and that their values are correct. If these registry subkeys do not exist, create them. For more information about how to create these registry subkeys, click the following article number to view the article in the Microsoft Knowledge Base:

Method 6: Check for nonpresent, ghosted, or hidden network adapters

To uninstall the ghosted network adapter from the registry, complete these steps:

1.	Click Start, click Run, type cmd.exe, and then press ENTER.
2.	Type set devmgr_show_nonpresent_devices=1, and then press ENTER.
3.	Type Start DEVMGMT.MSC, and then press ENTER.
4.	Click View, and then click Show Hidden Devices.
5.	Expand the Network adapters tree.
6.	Right-click the dimmed network adapter, and then click Uninstall.

Method 7: Remove all the AutoDiscovery/AutoPurge (ADAP) information from the registry and reset the state of each performance library

To do this, open a command prompt, type winmgmt / clearadap, and then press ENTER.

SYMPTOMS

When you open the Network and Dial-up Connections folder, your Local Area Connection and dial-up connection icons may not be visible, although networking continues to function correctly. The only icon in the folder is the Make New Connection icon.

CAUSE

This behavior can occur if the following registry key or one of its subkeys has been deleted or changed to an invalid value:

HKEY_CLASSES_ROOT\Interface\{0000010C-0000-0000-C000-000000000046}

RESOLUTION

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 (http://support.microsoft.com/kb/322756/) How to back up and restore the registry in Windows

1.	Start Notepad.
2.	Type the following lines in Notepad: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\Interface\{0000010c-0000-0000-C000-000000000046}] @="IPersist" [HKEY_CLASSES_ROOT\Interface\{0000010c-0000-0000-C000-000000000046}\NumMethods] @="4" [HKEY_CLASSES_ROOT\Interface\{0000010c-0000-0000-C000-000000000046}\ProxyStubClsid32] @="{00000320-0000-0000-C000-000000000046}"
3.	Save the file as Restore.reg. Note that Notepad may add a .txt extension to the file name. If this occurs, rename the file to Restore.reg.
4.	Double-click the Restore.reg file.
5.	When you are prompted to confirm that you want to add the information to the registry, click Yes.
6.	Restart your computer.