Legacy Update: Get back online, activate, and install updates on your legacy Windows PC

Microsoft .NET Framework 3.5 contains many new features building incrementally upon .NET Framework 2.0 and 3.0, and includes .NET Framework 2.0 service pack 1 and .NET Framework 3.0 service pack 1.

• .NET Framework 3.5 builds incrementally on the new features added in .NET Framework 3.0. For example, feature sets in Windows Workflow Foundation (WF), Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF) and Windows CardSpace. In addition, .NET Framework 3.5 contains a number of new features in several technology areas which have been added as new assemblies to avoid breaking changes. They include the following:
  
  • Deep integration of Language Integrated Query (LINQ) and data awareness. This new feature will let you write code written in LINQ-enabled languages to filter, enumerate, and create projections of several types of SQL data, collections, XML, and DataSets by using the same syntax.
  • ASP.NET AJAX lets you create more efficient, more interactive, and highly-personalized Web experiences that work across all the most popular browsers.
  • New Web protocol support for building WCF services including AJAX, JSON, REST, POX, RSS, ATOM, and several new WS-* standards.
  • Full tooling support in Visual Studio 2008 for WF, WCF, and WPF, including the new workflow-enabled services technology.
  • New classes in .NET Framework 3.5 base class library (BCL) that address many common customer requests.
  
  IMPORTANT:
  • If you have installed earlier pre-release versions of .NET Framework 3.5, then you must uninstall them prior to running this installation by using Add or Remove Programs.
  
  For more details on this release of the framework, see the following references:
  http://msdn2.microsoft.com/en-us/vstudio/aa700830.aspx
  http://msdn2.microsoft.com/en-us/netframework/default.aspx

Files

Status: Live This download is still available on microsoft.com. The downloads below will come directly from the Microsoft Download Center.

File	SHA1 Hash	Size
dotNetFx35setup.exe	b0ca05c12ebb9a3610206bad7f219e02b7873cbd	2.71 MB

File sizes and hashes are retrieved from the Wayback Machine’s indexes. They may not match the latest versions of files hosted on Microsoft servers.

• • Processor: 400 MHz Pentium processor or equivalent (Minimum); 1GHz Pentium processor or equivalent (Recommended)
    
  • RAM:96 MB (Minimum); 256 MB (Recommended)
    
  • Hard Disk: Up to 500 MB of available space may be required
    
  • CD or DVD Drive: Not required
    
  • Display: 800 x 600, 256 colors (Minimum); 1024 x 768 high color, 32-bit (Recommended)
    

• 
  
  1. Important: Make sure you have the latest service pack and critical updates for the version of Windows on the computer. To look for recent updates, visit Windows Update. In addition, make sure you have Windows Installer 3.1 installed before you install this service pack
  
  
  2. Click the Download button on this page to start the download
  
  
  3. To save the download to your computer for installation at a later time, click Save.
  
  
  4. To cancel the installation, click Cancel.
  
  
  
  ----------------------------------------------
  Full Redistributable Package
  To download the full redistributable package, rather than the bootstrapper, click on the link below to start the download:
  .NET Framework 3.5 full package