You cannot open a file whose file name is fully encoded when you use Internet Explorer 9 to browse the webpage that contains the file

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Article ID: 2696955 - View products that this article applies to.
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SYMPTOMS

When you use Windows Internet Explorer 9 to browse a webpage that contains a file whose file name is fully encoded, you cannot open the file by using the correct application.

For example, a file on the webpage has the file name File40.txt. The file name is fully encoded in the webpage as follows:
Content-Disposition: attachment; filename*=UTF-8'en'%46%69%6c%65%34%30%2e%74%78%74;
In this example, when you use Internet Explorer 9 to browse this webpage and then download File40.txt, you are prompted to open File40.txt[1]. When you try to open the file, the file does not open.

Note If you use Internet Explorer 8, the file name is listed as File40[1].txt in the prompt, and the file opens as expected.

RESOLUTION

To resolve this problem, install the update that is described in this section.

Security update information

To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, go to the following Microsoft website:
http://update.microsoft.com
For more technical information about the most recent cumulative security update for Internet Explorer, go to the following Microsoft website:
http://www.microsoft.com/technet/security/current.aspx
Note This update was first included in security update 2699988.

For more information about the security update, click the following article number to view the article in the Microsoft Knowledge Base:
2699988 MS12-037: Cumulative security update for Internet Explorer: June 12, 2012

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information about software update terminology, 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

Properties

Article ID: 2696955 - Last Review: June 13, 2012 - Revision: 1.0
APPLIES TO
  • Windows Internet Explorer 9
Keywords: 
kbqfe kbbug kbfix kbexpertiseinter kbsurveynew KB2696955

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