Microsoft KB Archive/216270

= 128-Bit Encryption Upgrade May Not Work with Service Pack 4 =

Article ID: 216270

Article Last Modified on 1/17/2007

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APPLIES TO


 * Microsoft Internet Explorer 4.01 128-Bit Edition
 * Microsoft Internet Explorer 4.0 128-Bit Edition

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This article was previously published under Q216270



SYMPTOMS
When you upgrade to 128-bit encryption for Internet Explorer on a Windows NT 4.0-based computer with Service Pack 4, the upgrade may not provide 128-bit security.



CAUSE
This behavior occurs because the files that are installed by the 128-bit security update are older than the Service Pack 4 security files already on your computer.



RESOLUTION
To resolve this issue, install Windows NT 4.0 Service Pack 4, 128-Bit North American Version. This is available at the following Microsoft Web site:

http://www.microsoft.com/downloads/details.aspx?familyid=8b3a1f23-c17c-4dc9-96ea-cf8652acf2d4&displaylang=en



MORE INFORMATION
For more information about 128-bit encryption, see the following articles in the Microsoft Knowledge Base:

195833 How to Upgrade Internet Explorer to 128-Bit Encryption

176820 Differences Between 128-bit and 40-bit versions of SP3 and SP4

Keywords: kbprb KB216270

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