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

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\<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