Network Error (1222): Unable to Browse the Network

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IMPORTANT: This article contains information about editing the registry.Before you edit the registry, make sure you understand how to restore it ifa problem occurs. For information about how to do this, view the "Restoringthe Registry" Help topic in Regedit.exe or the "Restoring aRegistry 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 mayexperience 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 <computer name>, and clicking OK results in the following error:
    \\<computer name>
    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 providersfrom the registry.
RESOLUTION
WARNING: Using Registry Editor incorrectly can cause serious problems thatmay require you to reinstall your operating system. Microsoft cannotguarantee that problems resulting from the incorrect use of Registry Editorcan be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys AndValues" Help topic in Registry Editor (Regedit.exe) or the "Add and DeleteInformation in the Registry" and "Edit Registry Data" Help topics inRegedt32.exe. Note that you should back up the registry before you edit it.

To resolve this issue, follow this procedure:
  1. Start Registry Editor (Regedt32.exe) and go to the following key:
          HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control      \NetworkProvider\Order						
  2. On the Edit menu, click Add Value.
  3. Enter the following value:
          Value Name: ProviderOrder      Data Type:  REG_SZ      Value:      LanmanWorkstation						
  4. This change should take effect without restarting Windows NT.
MORE INFORMATION
When Mpr.dll initializes, it reads the above registry key value. If Mpr.dllfails to get this information, it will return WN_NO_NETWORK, which producesthe symptoms described above.
Properties

Article ID: 170336 - Last Review: 12/04/2015 17:15:06 - Revision: 1.1

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

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