OLEXP: IPF in Inetcomm.dll When You Send or Receive E-mail Message

When you attempt to send or receive an e-mail message using Outlook Express, you may receive the following error message:

This error message can occur if you install the Windows Sockets (Winsock) 2 Update, but do not update Transmission Control Protocol/Internet Protocol (TCP/IP) using the Vipup20.exe and Vtcpup20.exe files.

This error message also occurs if you install Microsoft Personal Web Server 4.0 from the Microsoft Windows NT 4.0 Option Pack. This version of Personal Web Server 4.0 includes the Winsock 2 Update.

To resolve this behavior, download and install the Vipup20.exe and Vtcpup20.exe files from the Microsoft Download Center.

The following files are available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: 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.

To work around this behavior, revert to Winsock 1.1 by uninstalling the Winsock 2 Update. To do so, double-click the Ws2bakup.bat file located in the drive:\windows\ws2bakup folder, where drive is the drive letter on which the Windows folder is located, and windows is the name of the folder in which Windows is installed.

When you install the Winsock 2 Update but do not update TCP/IP, the Inetcomm.dll file is not updated to a version that is compatible with the Winsock 2 Update. When you install the Vipup20.exe and Vtcpup20.exe files, the Inetcomm.dll file is properly updated.

For information about how to obtain the Vipup20.exe and Vtcpup20.exe files from the Microsoft Download Center, please see the following articles in the Microsoft Knowledge Base: