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FIX: You cannot download a .NET Framework assembly in Internet Explorer

This article has been archived. It is offered "as is" and will no longer be updated.
When you try to download a Microsoft .NET Framework assembly (either an .exe module or a .dll module) by using Microsoft Internet Explorer, the download fails. You will notice that the module does not appear in the download cache. Also, if the module implements a control, the control does not appear in the Web browser.

This problem occurs if the Web server has HTTP compression enabled.
This problem occurs because a bug exists in the Microsoft common language runtime. This bug causes the common language runtime to try to use the downloaded module while Internet Explorer is still using the module. This behavior causes a sharing violation that prevents the download from completing successfully.

Software update information

A supported software update is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This software update may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft .NET Framework 1.1 service pack that contains this software update.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the software update. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.


You must have the Microsoft .NET Framework 1.1 installed to apply this software update.

Restart requirement

You do not have to restart your computer after you apply this software update.

Software update replacement information

This software update does not replace any other software updates

File information

The English version of this software update has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time      Version        Size       File name   ------------------------------------------------------------------   13-Feb-2004  01:37:08  1.1.4322.1000    311,296  Mscorjit.dll   13-Feb-2004  01:36:54  1.1.4322.1000    278,528  Fusion.dll   13-Feb-2004  15:27:14  1.1.4322.1000  2,093,056  Mscorlib.dll   13-Feb-2004  01:30:18                    10,756  Mscorlib.ldo   13-Feb-2004  01:39:56  1.1.4322.1000     77,824  CORPerfMonExt.dll   13-Feb-2004  01:40:08  1.1.4322.1000    102,400  Mscorld.dll   13-Feb-2004  01:38:14  1.1.4322.1000  2,502,656  Mscorsvr.dll   13-Feb-2004  01:39:12  1.1.4322.1000  2,490,368  Mscorwks.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
For additional information about the terminology that is used to describe Microsoft product updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 837033 - Last Review: 12/08/2015 06:21:13 - Revision: 2.1

Microsoft .NET Framework 1.1

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