How to Remove and Reinstall Dial-Up Networking and TCP/IP Files

• Microsoft Windows 95
• Microsoft Windows 98

SUMMARY

This article describes how to remove and reinstall Dial-Up Networking and Transport Control Protocol/Internet Protocol (TCP/IP). These steps may be necessary under the following conditions:

• You are unable to connect to a remote computer, remote network or the Internet using TCP/IP bound to a dial-up adapter.



• You have verified the accuracy of your TCP/IP settings.



• You have verified your modem is functioning correctly.

MORE INFORMATION

To remove and reinstall Dial-Up Networking and TCP/IP, use the following steps:

Note that you should have your original Windows CD-ROM or disks available before beginning these steps.

1. Record the configuration information for each connection in the Dial-Up Networking folder. To do so, use the following steps:
   
   
   1. Double-click My Computer, and then double-click Dial-Up Networking.
   
   
   
   2. Right-click a connection, click Properties, and then record all of the settings including the TCP/IP information. Repeat this process with another connection until you have recorded all of your connection's configuration information.
   
   
   



2. If the Dial-Up Networking 1.2 or 1.3 Update is installed, uninstall it. If it is not installed, continue to the next step. To uninstall the Dial-Up Networking 1.2 or 1.3 Update, use the following steps:
   
   
   1. Click Start, point to Settings, click Control Panel, and then double-click Add/Remove Programs.
   
   
   
   2. On the Install/Uninstall tab, click Dial-Up Networking Upgrade 1.2 (or 1.3), and then click Add/Remove.
   
   
   
   3. When you are prompted to remove the update, click Yes, and then click OK.
   
   
   



3. Delete all of your connections from the Dial-Up Networking folder. To do so, right-click a connection, and then click Delete. Repeat this process with another connection until you have deleted all of your connections, and then close the Dial-Up Networking folder.



4. In Network properties, record each component and its configuration information:
   
   
   1. Click Start, point to Settings, click Control Panel, and then double-click Network.
   
   
   
   2. Click a component on the Configuration tab, click Properties, and then record all of the component's settings. Repeat this process with another component until you have recorded all of your component's configuration information.
   
   
   
   NOTE: Make sure that you have the required disks to reinstall any third-party items before you remove them in Network properties.



5. Remove all of the network components from Network properties. To do so, click a component on the Configuration tab, and then click Remove. Repeat this process until you have deleted all of the network components from Network properties, click OK, and then click Yes when you are prompted to restart your computer.



6. Uninstall Dial-Up Networking. To do so, follow these steps:
   
   
   1. Click Start, point to Settings, click Control Panel, and then double-click Add/Remove Programs.
   
   
   
   2. Click the Windows Setup tab, click Communications (the word Communications, not the checkbox), click Details, and then click the Dial-Up Networking check box to clear it.
   
   
   
   3. Click OK, click Apply, click OK, and then click Yes when you are prompted to restart your computer.
   
   
   



7. Restart your computer in MS-DOS Mode. To do so, click Start, click Shut Down, click "Restart in MS-DOS mode," and then click OK.



8. At the command prompt, type the following commands, pressing ENTER after each command:

   cd \
   cd windows\system
   ren pppmac.vxd pppmac.dxv
   ren rnasetup.dll rnasetup.old
   ren rnaapp.exe rnaapp.eex
   ren rnaui.dll rnaui.lld
   ren rnanp.dll rnanp.lld
   ren rnathunk.dll rnathunk.lld
   ren rasapi16.dll rasapi16.lld
   ren rasapi32.dll rasapi32.lld
   ren rnaserv.dll rnaserv.lld
   ren smmscrpt.dll smmscrpt.lld
   ren smmsetup.dll smmsetup.lld
   ren splitter.vxd splitter.dxv
   ren spap.vxd spap.dxv
   ren vgateway.vxd vgateway.dxv
   ren wsock32.dll wsock32.lld
   ren rnaph.dll rnaph.lld
   ren wsock.vxd wsock.dxv
   ren vdhcp.386 vdhcp.683
   ren vip.386 vip.683
   ren vnbt.386 vnbt.683
   ren vtcp.386 vtcp.683
   ren vtdi.386 vtdi.683
   cd..
   ren winsock.dll winsock.old
   cd \
   cd progra~1\access~1
   ren slipmenu.scp slipmenu.old
   ren slip.scp slip.old
   cd\
   cd windows\inf
   ren rna.inf rna.fni
   ren drvdata.bin drvdata.old
   ren drvidx.bin drvidx.old

   NOTE: Some of these files may not be present.



9. Restart your computer, and then extract the files in the following table from your original Windows disks or CD-ROM to the following folders.




File	Folder
Rasapi32.dll	Windows\System
Wsock32.dll	Windows\System
Rnasetup.dll	Windows\System
Rna.inf	Windows\Inf

For information about how to extract a file, see the following article in the Microsoft Knowledge Base:

Q129605 How to Extract Original Compressed Windows Files

For information about which cabinet files contain the files you want to extract, please see the following articles in the Microsoft Knowledge Base:

Q135540 Windows 95 CD-ROM Directory Listing (1 of 5)

Q135537 Windows 95 CD-ROM Directory Listing (2 of 5)

Q135538 Windows 95 CD-ROM Directory Listing (3 of 5)

Q135539 Windows 95 CD-ROM Directory Listing (4 of 5)

Q135541 Windows 95 CD-ROM Directory Listing (5 of 5)

Q188428 Windows 98 CD-ROM Directory Listing (1 of 14)

Q188429 Windows 98 CD-ROM Directory Listing (2 of 14)

Q188430 Windows 98 CD-ROM Directory Listing (3 of 14)

Q188431 Windows 98 CD-ROM Directory Listing (4 of 14)

Q188432 Windows 98 CD-ROM Directory Listing (5 of 14)

Q188433 Windows 98 CD-ROM Directory Listing (6 of 14)

Q188434 Windows 98 CD-ROM Directory Listing (7 of 14)

Q188435 Windows 98 CD-ROM Directory Listing (8 of 14)

Q188436 Windows 98 CD-ROM Directory Listing (9 of 14)

Q188437 Windows 98 CD-ROM Directory Listing (10 of 14)

Q188438 Windows 98 CD-ROM Directory Listing (11 of 14)

Q188439 Windows 98 CD-ROM Directory Listing (12 of 14)

Q188440 Windows 98 CD-ROM Directory Listing (13 of 14)

Q189503 Windows 98 CD-ROM Directory Listing (14 of 14)

10. Reinstall Dial-Up Networking. To do so, use the following steps:
    
    
    1. Click Start, point to Settings, click Control Panel, and then double-click Add/Remove Programs.
    
    
    
    2. Click the Windows Setup tab, click Communications (the word Communications, not the checkbox), click Details, and then click the Dial-Up Networking check box to select it.
    
    
    
    3. Click OK, click Apply, click OK, and then click Yes when you are prompted to restart your computer.
       
       NOTE: You may receive version conflict error messages during this process. If this happens, click Yes when you are prompted to keep a newer version of the Secure32.dll and Rpc*.dll files. Click No for all other files.
    
    
    



11. Reinstall and configure the network components (listed in step 5). To do so, use the following steps:
    
    
    1. If you have a network adapter installed, install the software for the adapter according to the manufacturer's instructions.
    
    
    
    2. Click Start, point to Settings, click Control Panel, and then double-click Network.
    
    
    
    3. Click the Configuration tab, click Add, click Adapter, click Add, click Microsoft in the Manufacturers box, click Dial-Up Adapter, and then click OK.
    
    
    
    4. Click Protocol, click Add, click Microsoft in the Manufacturers box, click TCP/IP, and then click OK.
       
       NOTE: You may receive version conflict error messages during this process. If this happens, click No when you are prompted to keep a newer version of each file.
    
    
    
    5. If needed, add a network client. To do so, click Client, click Add, click the appropriate manufacturer, click the client you want to install, and then click OK.
       
       NOTE: You may need to reconfigure the network components that have been reinstalled. To do so, click the network component, click Properties, add any appropriate settings, and then click OK. If needed, refer to the configuration information you recorded in step 4.
    
    
    



12. Restart your computer.



13. Recreate your Dial-Up Networking connections. To do so, use the following steps:
    
    
    1. Double-click My Computer, double-click Dial-Up Networking, and then follow the instructions on the screen in the Make New Connection Wizard.
    
    
    
    2. Right-click the connection that you created, click Properties, and then verify that the settings are the same as the configuration information you recorded in step 2. Repeat steps a and b until you have recreated all of your Dial-Up Networking connections.
    
    
    

Error 745: An essential file is missing. Re-install Dial-Up Networking.

Q174579 Error Message: Error 745: An Essential File Is Missing

Additional query words: manually uninstall manual

Keywords          : kbnetwork dun win95 win98 
Version           : WINDOWS:95
Platform          : WINDOWS 
Issue type        : kbhowto 

Last Reviewed: August 9, 1999