Cisco TCP/IP Causes Computer to Stop Responding

When you attempt to shut down Windows, your computer may stop responding (hang).

This behavior can occur if you are using Cisco TCP/IP Suite 100 as your Transmission Control Protocol/Internet Protocol (TCP/IP) stack. The Windows 98 shutdown process waits for a return from the NdisCloseAdapter variable call to the networking stack. The Cisco software does not recognize this call, so the computer appears to not respond.

To resolve this behavior, remove Cisco TCP/IP Suite 100, and then install Microsoft TCP/IP. To do so, follow these steps:

1. Click Start, point to Settings, click Control Panel, and then double-click Network.
2. In the list of installed network components, click Cisco TCP/IP Suite 100, and then click Remove.
3. Click Add, click Protocol, and then click Add.
4. In the Manufacturers box, click Microsoft, and then click TCP/IP in the Network Protocols box.
5. Click OK, and then restart your computer when you are prompted to do so.

To work around this behavior, Cisco Systems suggests reverting to the version of the Vnbt.386 file included with Microsoft Windows 95. To do so, follow these steps:

1. Click Start, point to Find, and then click Files Or Folders.
2. In the Named box, type vnbt.386, and then click Find Now.
3. In the list of found files, right-click the Vnbt.386 file, click Rename, and then type a new name for the file (such as Vnbt.xxx).
4. Close the Find window.
5. Extract a new copy of the Vnbt.386 file from your original Windows 95 disks or CD-ROM into the Windows\System folder. The Vnbt.386 file is located in the following locations:
   
   
   • The Win95_12.cab cabinet file on the Windows 95 CD-ROM.
   • The Win95_18.cab cabinet file on the Windows 95 OEM Service Release 2 (OSR2) CD-ROM.
   • The Win95_13.cab cabinet file on disk 13 of the original Windows 95 DMF floppy disks.
   • The Win95_20.cab cabinet file on disk 20 of the original Windows 95 non-DMF floppy disks.
   For information about using the Extract tool, type extract at a command prompt, or see the following article in the Microsoft Knowledge Base:
   ARTICLE-ID: 129605  (http://support.microsoft.com/kb/129605/EN-US/ )
   TITLE : How to Extract Original Compressed Windows Files

Microsoft has confirmed that this behavior is not caused by a problem in Windows 98, but may be caused by design changes in Windows 98.

Cisco Systems no longer provides technical support for Cisco TCP/IP Suite 100.



The third-party product discussed in this article is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

More Help

If you do not have Cisco TCP/IP Suite 100 installed on your computer, please see the following article in the Microsoft Knowledge Base: If this article does not describe your shutdown-related issue, please see the following Microsoft Web site to view more articles about shutting down Windows 98: