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I am unable to install TCP/IP, why?
John Savill
May 17, 1999
1 Min Read
A. If you are trying to reinstall TCP/IP after previouslyuninstalling it the problem may be due to certain TCP/IP registry values notbeing removed correctly.
To manually remove perform the following:
Start the registry editor (regedt32.exe)
Select the key you want to delete.
Select the 'Security' menu and select 'Owner...'. (The 'Owner' dialog boxappears.)
Click 'Take Ownership'.Select the 'Security' menu and select 'Permissions...'. (The 'Registry KeyPermissions' dialog box appears.)
In the 'Name' list box, select 'Everyone'.
Select 'Full Control' from the 'Type of Access' drop-down list box.
Select the 'Replace Permission on Existing Subkeys' check box.
Click 'OK'.
Repeat steps 2 to 8 for all registry keys to be deleted
Reboot the computer so that Registry changes are recognized by Windows NT.
An alternative which avoids having to change security is to startregedt32.exe under the System account by submitting it via the schedule service
C:> net start schedule (only if not already running)
C:> at /inter regedt32.exe
C:> net stop schedule (only if you had to start it)
Once the computer has rebooted restart REGEDT32.EXE and ensure all of thefollowing are deleted (these are the keys whose security you must set)
Connectivity Utilities:
HKEY_LOCAL_MACHINESoftwareMicrosoftNetBT
HKEY_LOCAL_MACHINESoftwareMicrosoftTcpip
HKEY_LOCAL_MACHINESoftwareMicrosoftTcpipCU
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesDHCP
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLmhosts
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices'NetDriver'xParametersTcpip(where 'x' is the number of the network adapter).
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNetBT
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpip
SNMP Service:
HKEY_LOCAL_MACHINESoftwareMicrosoftRFC1156Agent
HKEY_LOCAL_MACHINESoftwareMicrosoftSNMP
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesSNMP
TCP/IP Network Printing Support:
HKEY_LOCAL_MACHINESoftwareMicrosoftLPDSVC
HKEY_LOCAL_MACHINESoftwareMicrosoftTcpPrint
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLPDSVC
FTP Server Service:
HKEY_LOCAL_MACHINESoftwareMicrosoftFTPSVC
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesFTPSVC
Simple TCP/IP Services:
HKEY_LOCAL_MACHINESoftwareMicrosoftSimpTcp
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesSimpTcp
DHCP Server Service:
HKEY_LOCAL_MACHINESoftwareMicrosoftDhcpMibAgent
HKEY_LOCAL_MACHINESoftwareMicrosoftDhcpServer
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesDhcpServer
WINS Server Service:
HKEY_LOCAL_MACHINESoftwareMicrosoftWinsHKEY_LOCAL_MACHINESoftwareMicrosoftWinsMibAgent
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWins
Windows sockets:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWinsock
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWinsock2
It may also be necessary to remove the following keys:
HKEY_LOCAL_MACHINESystemCurrentControlSetEnumRootLegacy_DHCP
HKEY_LOCAL_MACHINESystemCurrentControlSetEnumRootLegacy_Lmhosts
HKEY_LOCAL_MACHINESystemCurrentControlSetEnumRootLegacy_LPDSVC
HKEY_LOCAL_MACHINESystemCurrentControlSetEnumRootLegacy_NetBT
HKEY_LOCAL_MACHINESystemCurrentControlSetEnumRootLegacy_TCPIP
HKEY_LOCAL_MACHINESystemCurrentControlSetServicesLanManServerLinkageBind
HKEY_LOCAL_MACHINESystemCurrentControlSetServicesLanManWorkstationLinkageBind
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