Microsoft has released the Dial-Up Networking (DUN) version 1.4 upgrade for the products that are listed at the beginning of this article. This article provides a summary of the updated features, and information about how to obtain the upgrade.

DUN version 1.4 contains no newly released features, but combines previously released updates into a single install package. It includes the latest security updates and networking related updates, which can be found on the following websites.

NOTE: The following links are to the general downloads for the indicated products; refer to the "More Information" section for exact links to the DUN update download.

Windows 98 and Windows 98 Second Edition:

http://support.microsoft.com/ph/1139 (http://support.microsoft.com/ph/1139)

For additional information about the update, click the article number below to view the article in the Microsoft Knowledge Base:

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Microsoft Windows 98 Second Edition

This update for DUN in Windows 98 Second Edition adds the ability to encrypt dial-up and Point to Point Tunneling Protocol (PPTP) traffic by using 128-bit keys. After you install this upgrade, a Windows 98 Second Edition computer can establish either 40-bit or 128-bit encrypted sessions by using Microsoft Point to Point Encryption.

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Microsoft Windows 98

The DUN 1.4 upgrade for Windows 98 supports 128-bit encryption for both dial-up and PPTP connections and resolves situations in which PPTP connections would no longer transmit data. It includes all of the features from the earlier Windows 98 Security upgrade which strengthened password management and data encryption in PPTP connections. New features in DUN 1.4:

•	128-bit encryption is supported with the DUN 1.4 upgrade.
•	The DUN 1.4 upgrade improves the stability of PPTP connections.

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Microsoft Windows 95 and Microsoft Windows 95 OEM Service Release

The DUN 1.4 upgrade provides additional features for the DUN components that were first introduced in Windows 95. The DUN 1.4 release includes all of the features of all previous DUN releases, as well as those that are included in the Integrated Services Digital Network (ISDN) version 1.1 release. DUN 1.4 features include PPTP client support, 128-bit encryption, support for internal ISDN adapters, multilink support, and connection-time scripting to automate non-standard login connections. The DUN 1.4 upgrade can be applied to any version of Windows 95. However, you cannot install the Windows 95 version of this upgrade on any other version of Windows. New features in DUN 1.4:

•	128-bit encryption is supported with the DUN 1.4 upgrade.
•	The DUN 1.4 upgrade improves the stability of PPTP connections.
•	A year 2000 fix for the Dynamic Host Configuration Protocol (DHCP) client has been included in the DUN 1.4 upgrade.

IMPORTANT: Before you try to obtain or install the DUN 1.4 upgrade, verify which version of Windows is running on your computer. To do so, right-click My Computer.

Windows 95:

The following file is available for download from the Microsoft Download Center:
Windows 98:

The following file is available for download from the Microsoft Download Center:
Windows 98 Second Edition:

The following file is 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.

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For additional information on the updates described in this article, please refer to the below knowledge base articles:

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