7/27/2019 Uninstall TCP IP

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Instructions1Press "Windows Key"+"R" on your keyboard.

2Type "C:\Windows\inf\nettcpip.inf" without the quotes and press "Enter."

3Press "Ctrl"+"F" and type "Characteristics" without quotes, then press "Enter."

4Change the line "Characteristics = 0xa0" to read "Characteristics=0x80"

5Press "Ctrl"+"S" to save the file, then close the Notepad.

6Press "Windows Key"+"R" on your keyboard.

7Type "control netconnections" without quotes, then press "Enter."

8Right-click "Local Area Connection," then select "Properties."

9Click the "Install" button and select "Protocol."

10Click the "Have Disk" button.

11Type "C:\Windows\inf" without the quotes in the field box.

12Select "Internet Protocol (TCP/IP), and then click the "OK" button. Wait to be returned back to the "Properties" dialog.

13Click to highlight "Internet Protocol (TCP/IP)."

14Click the "Uninstall" button and then on "Yes."

15Restart the computer.

Step #1

Full uninstall of TCP/IP ... no ********.----------------------------------------------------------------------These steps are copied from http://support.microsoft.com/kb/32535611. Locate the Nettcpip.inf file in %winroot%\inf, and then open the file in Notepad.12. Locate the [MS_TCPIP.PrimaryInstall] section.13. Edit the Characteristics = 0xa0 entry and replace 0xa0 with 0x80.14. Save the file, and then exit Notepad.15. In Control Panel, double-click Network Connections, right-click Local Area Connection, and then select Properties.

7/27/2019 Uninstall TCP IP

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16. On the General tab, click Install, select Protocol, and then click Add.17. In the Select Network Protocols window, click Have Disk.18. In the Copy manufacturer's files from: text box, type c:\windows\inf, and then click OK.19. Select Internet Protocol (TCP/IP), and then click OK.Note This step will return you to the Local Area Connection Properties screen, but now the Uninstall button is available.20. Select Internet Protocol (TCP/IP), click Uninstall, and then click Yes.RESTART

succesfull uninstallation of TCP/IP will remove numerous keys from the registryincludingHKLM/system/CurrentControlSet/services/tcpipHKLM/system/CurrentControlSet/services/dhcpHKLM/system/CurrentControlSet/services/dnscacheHKLM/system/CurrentControlSet/services/ipsecHKLM/system/CurrentControlSet/services/policyagentHKLM/system/CurrentControlSet/services/atmarpcHKLM/system/CurrentControlSet/services/nlaThese represent various interconnected and interdependant services.

For good measure you should delete the following keys before reinstalling TCP/IPin step #2HKLM/system/CurrentControlSet/services/winsock

HKLM/system/CurrentControlSet/services/winsock2

Step #2Reinstall of TCP/IP----------------------------------------------------------------------Following the above substep #13, replace the 0x80 back to 0xa0, this will eliminate the related "unsigned driver" error that was encountered during the uninstallation phase.

Return to "local area connection"> properties > general tab > install > Protocol> TCP/IP

You may receive an "Extended Error" failure upon trying to reinstall the TCP/IP,

this is related to the installer sub-system conflicting with the security database status.

to check the integrity of the security databaseesentutl /g c:\windows\security\Database\secedit.sdb

There may be a message saying database is out of datefirst try the recovery optionesentutl /r c:\windows\security\Database\secedit.sdb

this did not work for me, I needed the repair optionesentutl /p c:\windows\security\Database\secedit.sdb

rerun the /g option to ensure that integrity is good and database is up to date.

Now return to the "local area network setup"choose install > protocol > tcp/ip and try again

reboot.