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Q151237: Error Message When Installing TCP/IP or Adding TCP/IP Service

Article: Q151237
Product(s): Microsoft Windows NT
Version(s): 3.5,3.51,4.0
Operating System(s): 
Keyword(s): kbnetworkkbfaq
Last Modified: 11-JUN-2002

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The information in this article applies to:

- Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0 
- Microsoft Windows NT Server versions 3.5, 3.51, 4.0 
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

  Q256986 Description of the Microsoft Windows Registry

SYMPTOMS
========

When you attempt to reinstall TCP/IP or add a TCP/IP service, you may receive
one or more of the following error messages:

  - Registry service subkey already exists

-or-

  - Unable to remove name space provider

RESOLUTION
==========

To resolve this problem, make sure that all of the components of a given TCP/IP
Service are properly removed, and then make sure that the following registry
subkeys are also removed before you restart the computer:

IMPORTANT: If you have Windows NT 4.0 with Service Pack 2, see the following
article in the Microsoft Knowledge Base before removing any registry keys:

Q162837Replacing TCPIP after SP2 causes STOP 0x00000050

WARNING: If you use Registry Editor incorrectly, you may cause serious problems
that may require you to reinstall your operating system. Microsoft cannot
guarantee that you can solve problems that result from using Registry Editor
incorrectly. Use Registry Editor at your own risk.
NOTE: You may or may not have all of the following Registry entries depending on
your TCP/IP configuration.

NOTE: CCS=CurrentControlSet

HKEY_LOCAL_MACHINE\Software\Microsoft\DhcpMibAgent
HKEY_LOCAL_MACHINE\Software\Microsoft\DhcpServer
HKEY_LOCAL_MACHINE\Software\Microsoft\FTPSVC
HKEY_LOCAL_MACHINE\Software\Microsoft\LPDSVC
HKEY_LOCAL_MACHINE\Software\Microsoft\NetBT
HKEY_LOCAL_MACHINE\Software\Microsoft\RFC1156Agent
HKEY_LOCAL_MACHINE\Software\Microsoft\SNMP
HKEY_LOCAL_MACHINE\Software\Microsoft\SimpTcp
HKEY_LOCAL_MACHINE\Software\Microsoft\Tcpip
HKEY_LOCAL_MACHINE\Software\Microsoft\TcpipCU
HKEY_LOCAL_MACHINE\Software\Microsoft\TcpPrint
HKEY_LOCAL_MACHINE\Software\Microsoft\Wins
HKEY_LOCAL_MACHINE\Software\Microsoft\WinsMibAgent

HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\DHCP
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\DhcpServer
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\FTPSVC
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\Lmhosts
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\LPDSVC
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\NetBT
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\SimpTcp
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\SNMP
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\Tcpip
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\Wins
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\WinSock
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\WinSock2
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\<NetDriver><x>\Parameters\Tcpip
where <NetDriver> is the name of network card installed on system and
where <x> is the number of the network adapter.

It may also be necessary to remove the following keys:

HKEY_LOCAL_MACHINE\System\CCS\Enum\Root\Legacy_DHCP
HKEY_LOCAL_MACHINE\System\CCS\Enum\Root\Legacy_Lmhosts
HKEY_LOCAL_MACHINE\System\CCS\Enum\Root\Legacy_LPDSVC
HKEY_LOCAL_MACHINE\System\CCS\Enum\Root\Legacy_NetBT
HKEY_LOCAL_MACHINE\System\CCS\Enum\Root\Legacy_TCPIP
HKEY_LOCAL_MACHINE\System\CCS\Services\LanManServer\Linkage\Bind
HKEY_LOCAL_MACHINE\System\CCS\Services\LanManWorkstation\Linkage\Bind
HKEY_LOCAL_MACHINE\SYSTEM\CCS\Services\PPTP

NOTE: Removing these additional keys requires manipulation of the rights on those
keys. The default rights for Everyone is Read. This needs to be done for each
key you wish to remove. To change the rights, log on as Administrator, run
Regedt32.exe, and select the key you want to delete. From the menu, select
Security, Owner, Take ownership. Then, Select Security, Permissions, and give
full control to Everyone, selecting "Replace permission on existing subkeys."

Restart the computer so that registry changes are recognized by Windows NT.

If Remote Access Service (RAS) is installed, you may also need to manually delete
the following RAS and NDISWANx registry entries:

1. Locate HKEY_LOCAL_MACHINE\System\CCS\Services\NetBIOS\Linkage.

2. Double-click Bind, and remove all NetBT_xxxx entries, such as:

       \Device\NetBT_El59x1
       \Device\NetBT_NdisWan1
       \Device\NetBT_NdisWan2
       \Device\NetBT_NdisWan3
       \Device\NetBT_NdisWan4
  HKEY_LOCAL_MACHINE\System\CCS\Services\RASARP
  HKEY_LOCAL_MACHINE\System\CCS\Services\RASAUTO
  HKEY_LOCAL_MACHINE\System\CCS\Services\RASMAN
 HKEY_LOCAL_MACHINE\System\CCS\Services\RASACD
 HKEY_LOCAL_MACHINE\System\CCS\Services\RASPPTPE
 HKEY_LOCAL_MACHINE\System\CCS\Services\RASPPTPF
 HKEY_LOCAL_MACHINE\System\CCS\Services\RASPPTPM
 HKEY_LOCAL_MACHINE\System\CCS\Services\NDISWANx\Parameters\TCPIP
  (where x reflects the numbers corresponding to the preceding  \Device\NetBT_NDISWANx.
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASARP
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASACD
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASAUTO
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASMAN
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASPPTPE
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASPPTPF
 HKEY_LOCAL_MACHINE\System\CCS\ENUM\Root\Legacy_RASPPTPM

Additional query words: remove manual manually regedt32 how to howto removing tcpip

======================================================================
Keywords          : kbnetwork kbfaq
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT350search kbWinNT400search kbWinNTW350 kbWinNTW350search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS350 kbWinNTS351search kbWinNTS350search
Version           : :3.5,3.51,4.0
Issue type        : kbprb

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