MS09-061: Description of the security update for the Microsoft .NET Framework 2.0 Service Pack 1 and the Microsoft .NET Framework 3.5 on Windows 2000, Windows XP, and Windows Server 2003: October 13, 2009

Microsoft has released security bulletin MS09-061. To view the complete security bulletin, visit one of the following Microsoft Web sites:

• Home users:
  http://www.microsoft.com/security/updates/bulletins/200910.aspx
  Skip the details: Download the updates for your home computer or laptop from the Microsoft Update Web site now:
  http://update.microsoft.com/microsoftupdate/
• IT professionals:
  http://www.microsoft.com/technet/security/bulletin/ms09-061.mspx

How to obtain help and support for this security update

For home users, no-charge support is available by calling 1-866-PCSAFETY in the United States and Canada or by contacting your local Microsoft subsidiary. For more information about how to contact your local Microsoft subsidiary for support issues with security updates, visit the Microsoft International Support Web site: North American customers can also obtain instant access to unlimited no-charge e-mail support or to unlimited individual chat support by visiting the following Microsoft Web site: For enterprise customers, support for security updates is available through your usual support contacts.

Prerequisites to install this security update

To install this security update, you must have Windows Installer 3.1 or a later version installed on the computer. To obtain the latest version of Windows Installer for the computer, visit the following Microsoft Web site:

Restart requirements

This hotfix does not require a system restart, but it will cause a restart of all Internet Information Services-related services including the IISADMIN, W3SVC, FTP and SMTP services. This is because the base product MSI for the .NET Framework 2.0 includes instructions for restarting these services. Therefore, every update to the product will execute these instructions.

Update removal information

After you install this update, you can uninstall it by using the Add or Remove Programs item in Control Panel.

Command-line switches for this update

You can find information about the various command-line switches that this update supports in security bulletin MS09-061 and on the following MSDN Web site: For more information about Windows Installer, visit the following MSDN Web site:

Known issues

For more information about installation issues with this update, click the following article numbers to view the articles in the Microsoft Knowledge Base:

The English (United States) version of this security update 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 Microsoft .NET Framework 2.0 Service Pack 1 and the Microsoft .NET Framework 3.5 on 32-bit systems

For Microsoft .NET Framework 2.0 Service Pack 1 and the Microsoft .NET Framework 3.5 on x64-based systems

For Microsoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5 on Itanium-based systems