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Q170336: Network Error (1222): Unable to Browse the Network

Article: Q170336
Product(s): Microsoft Windows NT
Version(s): 4.0
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 24-JUL-2002

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The information in this article applies to:

- Microsoft Windows NT Workstation version 4.0 
- Microsoft Windows NT Server version 4.0 
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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 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 <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 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:

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.dll
fails to get this information, it will return WN_NO_NETWORK, which produces the
symptoms described above.


Additional query words:

======================================================================
Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : :4.0

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