Download information
The following file is available for download from the Microsoft Download Center:
Download the Microsoft .NET Framework 3.5 security update package now. Release Date: August 10, 2010
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft 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.
Prerequisites
To install this 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 website:
Known issues and additional information about this security update
For more information about installation issues with Microsoft .NET Framework 3.5, click the following article numbers to view the article in the Microsoft Knowledge Base:
923100 When you try to install an update for the .NET Framework 1.0, 1.1, 2.0, 3.0, or 3.5, you may receive Windows Update error code "0x643" or Windows Installer error code "1603"
923101 Error message when you try to install a security update for the .NET Framework 2.0 on a computer that is running Windows Server 2003 x64 Edition: "Error 1324. The folder 'Program Files' contains an invalid character"
2197148 A known issue with the Microsoft .NET Framework 2.0 Service Pack 1 updates and the Microsoft .NET Framework 3.5 updates
2260913 Files in use or file locks can result in Framework Assembly files being deleted
2263996 Patching of Microsoft Framework can fail with Access is denied or File in Use error
Command-line switches for this update
Information about the various command line switches that are supported by this update can be found on the following Microsoft MSDN website:
For more information about Windows Installer, visit the following Microsoft MSDN website:
Restart requirement
You do not have to restart the computer after you apply this update if the affected files are not being used.
Update removal information
To remove this update, use the
Add or Remove Programs item in Control Panel.
Update replacement information
This replaces the following Microsoft .NET Framework 3.5 security update:
953300 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