An ASP.NET 2.0 hotfix rollup package is available for Windows 7 and for Windows Server 2008 R2

Applies to: Windows Server 2008 R2Windows 7


Microsoft has released a hotfix rollup package for Windows 7 and for Windows Server 2008 R2 to correct Microsoft ASP.NET 2.0 problems that are described in the following Microsoft Knowledge Base (KB) articles:
969454 FIX: Error message together with a System.InvalidOperationException exception when you run an ASP.NET 2.0 application: "Hashtable insert failed. Load factor too high"

970459 FIX: Error message on an ASP.NET page after you submit a form that has the "action" attribute defined after you install the .NET Framework 2.0 SP2 or the .NET Framework 3.5 S970459 : "Validation of viewstate MAC failed"

971993 Description of the hotfix that enables ASP.NET Web applications to support claims-based identities when you use membership providers

974165 FIX: Event ID 2262 is logged in the Application log when an ASP.NET 2.0 Web application becomes unresponsive

974367 You lose session data for requests that are currently running when you configure an ASP.NET 2.0-based application to use SQLServer session-state mode

977104 FIX: The W3wp.exe process crashes when a service operation is implemented asynchronously in a WCF service that is running in ASP.NET 2.0 compatibility mode


Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone 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.

Alternatively, you can download this hotfix from the following Microsoft Connect Web site:


You must have Windows 7 or Windows Server 2008 R2 installed to apply this hotfix.

Restart requirement

You may have to restart the computer after you apply this hotfix when any of the affected files are being used when you install this hotfix. You may not have to restart the computer if you close all ASP.NET Web sites before you install this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The 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 item in Control Panel.
For all supported x86-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatformService branch
Webengine.dll2.0.50727.5014436,04830-Apr-201023:30x86Not Applicable
System.web.dll2.0.50727.50145,251,07230-Apr-201023:30x86Not Applicable
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatformService branch
Webengine.dll2.0.50727.5014745,29630-Apr-201023:30x64Not Applicable
System.web.dll2.0.50727.50145,259,26430-Apr-201023:30x64Not Applicable
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatformService branch
Webengine.dll2.0.50727.50141,231,18430-Apr-201023:24IA-64Not Applicable
System.web.dll2.0.50727.50144,780,03230-Apr-201023:24IA-64Not Applicable


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