Microsoft KB Archive/170336

= Network Error (1222): Unable to Browse the Network =

Article ID: 170336

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q170336



IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.



SYMPTOMS
You are able to access network resources from a command prompt; however, when you try to access network resources from Windows Explorer, you may experience one or more of the following problems:  Double-clicking Network Neighborhood gives the following error:

Unable to browse the network.

Network error (1222).

-or-

 Clicking Start, clicking Run, typing, and clicking OK results in the following error:

\\

The network is not present or not started.

-or-

 From File Manager (Winfile.exe), none of the connect drive commands are present.



CAUSE
The Multiple Provider Router (Mpr.dll) cannot load any network providers from the registry.



RESOLUTION
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

To resolve this issue, follow this procedure:   Start Registry Editor (Regedt32.exe) and go to the following key:

     HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control \NetworkProvider\Order </li> On the Edit menu, click Add Value.</li>  Enter the following value:

<pre class="fixed_text">     Value Name: ProviderOrder Data Type: REG_SZ Value:     LanmanWorkstation </li> This change should take effect without restarting Windows NT.</li></ol>

<div class="moreinformation_section">

MORE INFORMATION
When Mpr.dll initializes, it reads the above registry key value. If Mpr.dll fails to get this information, it will return WN_NO_NETWORK, which produces the symptoms described above.

Keywords: kbnetwork KB170336

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