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FIX: IIS 6.0 compression corruption causes access violations
Article ID: 831464 - View products that this article applies to.
On a computer that is running Microsoft Windows Server 2003 and Microsoft Internet Information Services (IIS) 6.0, static files that are compressed may become corrupted and may include content from other files on the Web server. If this behavior occurs, the page that is returned to the client is not rendered correctly. An access violation may also occur.
Note This problem can affect Outlook Web Access (OWA) users. The problem may cause various script errors to be returned in the OWA pages, or the problem may cause pages to stop responding (hang) when the pages load.
For example, you may receive OWA errors that are similar, but not limited, to one of the following error messages:
Error: 'g_flsMimeInstalled' is undefined
After you log on to OWA, you may also receive an error message that is similar to the following:
Error: object expected
HTTP Error 405 - The HTTP verb used to access this page is not allowed.
If you are experiencing the symptoms described in the Symptoms section and you have already installed Microsoft Windows Server 2003 Service Pack1 (SP1), or if you continue to experience the problem the symptoms described in the Symptoms section after you apply the recommended pre-SP1 hotfix as an additional action, delete all the files in the %windir%\IIS Temporary compressed files folder as noted in the Workaround section.
The following file is available for download from the Microsoft Download Center:
Download the 831464 package now.
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For more information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591Microsoft 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 prevent any unauthorized changes to the file.
(http://support.microsoft.com/kb/119591/ )How to obtain Microsoft support files from online services
Restart requirementYou must restart your computer after you apply this hotfix.
File informationThe English version of this hotfix has the file attributes (or later file attributes) 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.
Note After you install the 831464 hotfix, you must delete the cached compressed copy of the affected files that are located on the server and client computers. To do this, follow the steps in the Workaround section.
Date Time Version Size File name ---------------------------------------------------- 29-Oct-2003 22:50 6.0.3790.99 336,384 W3core.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
If you cannot install this hotfix immediately, you may be able to temporarily work around this problem by deleting the cached, compressed copy of the affected file or files on the IIS server. By default, the compressed file is located the following folder:
%windir%\IIS Temporary Compressed FilesThis temporary directory location can be changed in the IIS Manager on the Service tab in the Web Sites property sheet.
To delete the cached files on the server, follow these steps: