Microsoft KB Archive/181228

= Download of File from IIS 4.0 Fails on IE 4.01 Client =

Article ID: 181228

Article Last Modified on 9/22/2005

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APPLIES TO


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

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This article was previously published under Q181228



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
When you connect an Internet Explorer (IE) version 4.01 to a Microsoft Internet Information Server (IIS) 4.0, and the IE 4.01 client attempts to download a file from the IIS 4.0 system via a Web page, the download may fail with the following error message:

The downloaded file is not available. This could be due to your

Security or Language settings or because the server was unable to

retrieve the requested file.



CAUSE
This is specific to IIS 4.0 and IE 4.01. When the Internet Information Server 4.0 computer responds to the IE 4.01 client, the IIS 4.0 system responds with a specific HTTP header response that causes the IE 4.01 client to fail when attempting a file download:


 * 1) HTTP/1.1 200
 * 2) Cache-control: private
 * 3) application/x-unknown

IIS 4.0 supports HTTP/1.1 200 by default, so it always sends this information to the IE 4.01 client. Also, IIS 4.0 sets the Cache-control directive to private by default. If the requested URL has no associated MIME type, then all three conditions are met, and the IE 4.01 client fails with the error message above.



RESOLUTION
To resolve this problem, upgrade to Internet Explorer 4.01 Service Pack 1 or later. For information about obtaining a later version of Internet Explorer, visit the following Microsoft Web site:

http://www.microsoft.com/ie



STATUS
Microsoft has confirmed this to be a problem in Internet Explorer 4.01 build 2106.

A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Contact Microsoft Technical Support for more information.

Additional query words: ierelease

Keywords: kbbug kbqfe kbhotfixserver KB181228

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