Microsoft KB Archive/151237

= Error Message When Installing TCP/IP or Adding TCP/IP Service =

Article ID: 151237

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q151237



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:

256986 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:

162837Replacing 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\\Parameters\Tcpip where  is the name of network card installed on system and where  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:

 Locate HKEY_LOCAL_MACHINE\System\CCS\Services\NetBIOS\Linkage.  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: kbfaq kbnetwork kbprb KB151237

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