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HOW TO: Reinstall TCP/IP - Windows XP
TCP/IP cannot be uninstalled on Windows XP. However, you can use the NetShell (netsh) utility to reset TCP/IP.
Click Start > Run.
In the Run box, type command and click OK.
At the DOS prompt, type netsh int ip reset c:\tcpipreset.txt and press the Enter key.
The system will pause for up to a minute while the TCP/IP stack is reset.
Once the cursor returns type exit and press Enter.
Restart your computer
HOW TO: Fix broken LSP/Winsock in WINXP SP2
netsh winsock reset catalog
1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. In Registry Editor, locate the following keys, right-click each key, and then click Delete: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock2
4. When you are prompted to confirm the deletion, click Yes.
Note Restart the computer after you delete the Winsock keys. Doing so causes the Windows XP operating system to create new shell entries for those two keys. If you do not restart the computer after you delete the Winsock keys, the next step does not work correctly.
Step 2: Install TCP/IP
1. Right-click the network connection, and then click Properties.
2. Click Install.
3. Click Protocol, and then click Add.
4. Click Have Disk.
5. Type C:\Windows\inf, and then click OK.
6. On the list of available protocols, click Internet Protocol (TCP/IP), and then click OK.
7. Restart the computer.
HOW TO: Remove TCP/IP from your Windows 2000-based computer
Click to clear the TCP/IP check box from all dial-up connections and all LAN connections in the Network and Dial-up Connections tool.
Install another protocol (NWlink or NetBEUI) to maintain a placeholder for each connection.
Restart your computer.
Reinstall TCP/IP, and then restart your computer.
HOW TO: There is a second way to reinstall TCP/IP files
These steps should work on both Windows 2000 and Windows XP
First, delete any dialup connections that still exist.
1) Click Start, then click Run
2) For windows XP, type C:\Windows\INF
For windows 2000 (or NT), type C:\WinNT\INF
Then click OK. This will open the windows INF folder in explorer.
3) Find the file nettcpip.inf (will say nettcpip, do not confuse with nettcpip.pnf)
4) Right-click on nettcpip.inf and click Install.
You will probably not see any activity when you click install; copying the files should take less than a second. At this point, restart the computer and rebuild the dialup connection
WARNING: The correct Windows 95/98 CD-ROM or Cabinet files must be available.
Incorrect versions can cause a system to become inoperable.
1. Double-click the My Computer icon.
2. Double-click the Control Panel icon.
3. Double-click the Network icon.
4. Select TCP/IP in the The following network components are installed list.
5. Click the Remove button
6. Note: Do not close the Network window. Leave the network window open while you perform the following steps.
7. Click the Start button, click Find, and choose Files or Folders.
8. In the Named field, type *.386. Click the arrow box on the Look in drop-down list and choose My Computer.
9. Click the Find now button.
10. Select Vip.386 in the Name list.
11. From the File menu, choose Rename.
12. Type Vip.old . Press the Enter key on your keyboard.
13. Note: Repeat steps 9-11 for the following files: Vtcp.386, Vdhcp.386, Vtdi.386 and Vnbt.386.
14. Close the Find all files window.
15. Go to the Network window.
16. Click the Add button
17. Select Protocol in the Network Components list. Click the Add button.
18. Select Microsoft in the Manufacturers list. Select TCP/IP in the Network Protocols list.
19. Click the OK button. Click the OK button. Note: You may be prompted for the Windows CD-ROM or cabinet files at this point.
20. Click the Yes button.
21. TCP/IP has been successfully replaced. Try connecting again after the computer is done rebooting.
There are 4 steps to this process:
1) Locate wsock32.dll on your computer
2) Delete any extra copies of wsock32.dll
3) Locate .cab files either on your computer or on your Win98 CD
4) Use the System File Checker (sfc) to reinstall wsock32.dll
Click the Start button --> Settings --> Control Panel.
Double-click the Network icon.
Make sure the Configuration tab is selected. Both Dial-Up Adapter and TCP/IP Dial Adapter should be present