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Q168747: Update to Windows 95 TCP/IP to Address Out-of-Band Issue

Article: Q168747
Product(s): Microsoft Windows 95.x Retail Product
Version(s): 1,2,2.1
Operating System(s): 
Keyword(s): kberrmsg kbfile kbnetwork osr1 osr2 win95 kbgraphxlinkcritical
Last Modified: 14-MAR-2002

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The information in this article applies to:

- Microsoft Windows 95 
- Microsoft Windows 95 OEM Service Release, versions 1, 2, 2.1 
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SYMPTOMS
========

On a computer running Microsoft Windows 95 (all releases) using the Microsoft
TCP/IP protocol, the following error message may occur when certain data is
received over the network:

  Fatal exception 0E at 0028:<address> in VxD MSTCP(01) + 000041AE.
  This was called from 0028:<address> in VxD NDIS(01) + 00000D7C.

After this error message occurs, the computer may not receive further network
data until Windows is restarted.

CAUSE
=====

This error message can occur if certain, very specific, "out-of-band" data
packets are deliberately sent to the server during a TCP/IP session.


RESOLUTION
==========

This issue is resolved by the following updated files for Windows 95 (all
releases):

- Vtcp.386 version 4.00.0954 (dated 05/20/97) and later

- Vnbt.386 version 4.00.0959 (dated 05/15/97) and later

To install these updated files, follow these steps:

1. Download the Vtcpupd.exe file to an empty folder.

2. In My Computer or Windows Explorer, double-click the Vtcpupd.exe file you
  downloaded in step 1.

3. Follow the instructions on the screen.

The following file is available for download from the Microsoft Download Center:

  Download Vtcpupd.exe now
  (http://download.microsoft.com/download/win95upg/patch1/1/w95/EN-US/vtcpupd.exe)

For additional information about how to download Microsoft Support files, click
the article number below to view the article in the Microsoft Knowledge Base:

  Q119591 How to Obtain Microsoft Support Files from Online Services

Microsoft used the most current virus detection software available on the date of
posting to scan this file for viruses. Once posted, the file is housed on secure
servers that prevent any unauthorized changes to the file.

MORE INFORMATION
================

The following files are installed by Vtcpupd.exe:

  File name     Version    Date/Time        Size     Destination folder
  ---------------------------------------------------------------------
  Vtcp.386      4.00.0954  05/20/97 09:54a  47,413   Windows\System
  Vnbt.386      4.00.0959  05/15/97 09:59a  95,497   Windows\System


For additional information about issues resolved by updates to these components,
see the following articles in the Microsoft Knowledge Base:

  Q163770 Cannot Log On to Windows NT Domain w/ DNS Name Resolution Only

  Q154579 Slow TCP/IP Performance When Resuming Large Data Transfer

  Q152791 Error Message: No Domain Server Was Available...

For additional information about a similar issue with Microsoft Windows NT, see
the following article in the Microsoft Knowledge Base:

  Q143478 Stop 0A in TCPIP.SYS When Receiving Out Of Band (OOB) Data


Additional query words:

======================================================================
Keywords          : kberrmsg kbfile kbnetwork osr1 osr2 win95 kbgraphxlinkcritical 
Technology        : kbWin95search kbOPKSearch kbZNotKeyword3 kbWin95OPKOSR2 kbWin95OPKOSR1 kbWin95OPKOSR210
Version           : :1,2,2.1

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