Microsoft small business knowledge base

Article ID: 170736 - Last Review: October 7, 2013 - Revision: 2.3

This article was previously published under Q170736
This article has been archived. It is offered "as is" and will no longer be updated.


A DLC program may not receive multicast packets in Windows 95 using Microsoft's 32-bit Data Link Control protocol (MSDLC32).


MSDLC32 does not receive packets addressed to multicast addresses.


This issue is resolved by the following updated file for Windows 95 and OSR2:
Dlc.vxd version 4.10.995 (dated 6/18/97) and later
To install this update, follow these steps:
  1. Download the Dlc32upd.exe file from the online service listed below to an empty folder.
  2. In My Computer or Windows Explorer, double-click the Dlc32upd.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:
Collapse this imageExpand this image
Download Dlc32upd.exe now (
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591  ( ) How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

The following files are installed by Dlc32upd.exe:
   File name     Version    Date/Time        Size     Destination folder
   Dlc.vxd       4.10.995   6/18/97 3:31p    237,470  Windows\System
For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:
170737  ( ) Windows 95 MSDLC32 Does Not Receive Broadcast Packets

170736  ( )

159344  ( ) Fatal Exception in DLC Running Program from NetWare Server

148765  ( ) Availability of DLC Update for MSDLC32 Protocol
This issue is resolved in Microsoft Windows 98.


A multicast address is associated with a group of network nodes or stations. Packets sent to a multicast address are expected to be received by all stations on the network segment or ring that have the specified multicast address registered.

  • Microsoft Windows 95
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