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Microsoft .NET Framework 4 (Web Installer)

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The Microsoft .NET Framework 4 web installer package downloads and installs the .NET Framework components required to run on the target machine architecture and OS. An Internet connection is required during the installation. .NET Framework 4 is required to run and develop applications to target the .NET Framework 4.

Quick details

Version: 4 Date published: 2/21/2011
File name Size
dotNetFx40_Full_setup.exe 869 KB Download

Overview

The .NET Framework is Microsoft's comprehensive and consistent programming model for building applications that have visually stunning user experiences, seamless and secure communication, and the ability to model a range of business processes.

The .NET Framework 4 works side by side with older Framework versions. Applications that are based on earlier versions of the Framework will continue to run on the version targeted by default.

The Microsoft .NET Framework 4 provides the following new features and improvements:

  • Improvements in Common Language Runtime (CLR) and Base Class Library (BCL)
    • Performance improvement including better multicore support, background garbage collection, and profiler attach on server.
    • New memory mapped file and numeric types.
    • Easier debugging including dump debugging, Watson minidumps, mixed mode debugging for 64 bit and code contracts.
    • For a comprehensive list of enhancements to CLR and BCL go here.
  • Innovations in the Visual Basic and C# languages, for example statement lambdas, implicit line continuations, dynamic dispatch, and named/optional parameters.
  • Improvements in Data Access and Modeling
    • The Entity Framework enables developers to program against relational databases using .NET objects and Language Integrated Query (LINQ). It has many new features, including persistence ignorance and POCO support, foreign key associations, lazy loading, test-driven development support, functions in the model, and new LINQ operators. Additional features include better n-tier support with self-tracking entities, customizable code generation using T4 templates, model first development, an improved designer experience, better performance, and pluralization of entity sets. For more information go here.
    • WCF Data Services is a component of the .NET Framework that enables you to create REST-based services and applications that use the Open Data Protocol (OData) to expose and consume data over the Web. WCF Data Services has many new features, including enhanced BLOB support, data binding, row count, feed customization, projections, and request pipeline improvements. Built-in integration with Microsoft Office 2010 now makes it possible to expose Microsoft Office SharePoint Server data as an OData feed and access that data feed by using the WCF Data Services client library. For more information go here.
  • Enhancements to ASP.NET
    • More control over HTML, element IDs and custom CSS that make it much easier to create standards-compliant and SEO-friendly web forms.
    • New dynamic data features including new query filters, entity templates, richer support for Entity Framework 4, and validation and templating features that can be easily applied to existing web forms.
    • Web forms support for new AJAX library improvements including built-in support for content delivery networks (CDNs).
    • For a comprehensive list of enhancements to ASP.NET go here.
  • Improvements in Windows Presentation Foundation (WPF)
    • Added support for Windows 7 multi-touch, ribbon controls, and taskbar extensibility features.
    • Added support for Surface 2.0 SDK.
    • New line-of-business controls including charting control, smart edit, data grid, and others that improve the experience for developers who build data centric applications.
    • Improvements in performance and scalability.
    • Visual improvements in text clarity, layout pixel snapping, localization, and interoperability.
    • For a comprehensive list of enhancements to WPF go here.
  • Improvements to Windows Workflow (WF) that enable developers to better host and interact with workflows. These include an improved activity programming model, an improved designer experience, a new flowchart modeling style, an expanded activity palette, workflow-rules integration, and new message correlation features. The .NET Framework 4 also offers significant performance gains for WF-based workflows. For a comprehensive list of enhancements to WF go here.
  • Improvements to Windows Communication Foundation (WCF) such as support for WCF Workflow Services enabling workflow programs with messaging activities, correlation support. Additionally, .NET Framework 4 provides new WCF features such as service discovery, routing service, REST support, diagnostics, and performance. For a comprehensive list of enhancements to WCF go here.
  • Innovative new parallel-programming features such as parallel loop support, Task Parallel Library (TPL), Parallel LINQ (PLINQ), and coordination data structures which let developers harness the power of multi-core processors.

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System requirements

Supported operating systems: Windows 7, Windows 7 Service Pack 1, Windows Server 2003 Service Pack 2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 R2 SP1, Windows Vista Service Pack 1, Windows XP Service Pack 3

    • Windows XP SP3
    • Windows Server 2003 SP2
    • Windows Vista SP1 or later
    • Windows Server 2008 (not supported on Server Core Role)
    • Windows 7
    • Windows Server 2008 R2 (not supported on Server Core Role)
    • Windows 7 SP1
    • Windows Server 2008 R2 SP1
  • Supported Architectures:
    • x86
    • x64
    • ia64 (some features are not supported on ia64 for example, WPF)
  • Hardware Requirements:
    • Recommended Minimum: Pentium 1 GHz or higher with 512 MB RAM or more
    • Minimum disk space:
      • x86 – 850 MB
      • x64 – 2 GB
  • Prerequisites:

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Instructions

  1. Important: Make sure that your computer has the latest Windows service pack and critical updates. To find security updates, visit Windows Update. If you are installing on XP 64 bit or Windows 2003 you might need to install the Windows Imaging Component. The Windows Imaging Component 32 bit can be found here . The Windows Imaging Component 64 bit can be found here .
  2. On this page, locate the Download button and then click it to start the download.
  3. To start the installation immediately, click Run.
  4. To save the download to your computer so that you can install it later, click Save.
  5. To cancel the installation, click Cancel.


Web Developers and Administrators

To install the .NET Framework on a Web server or to setup an entire Web development environment, use the Microsoft Web Platform Installer.

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Additional information


Additional Requirements for Server Installation

If you have to perform a server installation, your computer must have the following software in addition to the basic requirements:

  • Internet Information Services (IIS) version 6.0 or later. To access the features of ASP.NET, IIS with the latest security updates must be installed before the .NET Framework is installed. ASP.NET is supported only on Windows XP Professional, Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2.
  • (Recommended) Microsoft Data Access Components 2.8 or later


NOTE: Most users do not have to perform a server installation. If you are unsure whether to perform a server installation, just perform a basic installation.


Installer for Windows Server 2008 R2 Service Pack 1 Server Core

This version of Microsoft .NET Framework 4 does not support the Server Core role on Windows Server 2008 and Windows Server 2008 R2. To get a version of Microsoft .NET Framework 4 that supports Server Core role on Windows Server 2008 R2 Service Pack 1 go to Microsoft .NET Framework 4 (Standalone Installer) for Server Core.


.NET Framework 4 Readme

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Windows Internet Explorer 8 for Windows XP

Internet Explorer 8 is the latest version of the familiar web browser you are most comfortable using, helping you get everything you want from the web faster, easier, more privately and securely than ever before.

  • Faster Internet Explorer 8 is more responsive with new pages and tabs, opening up fast and reliably. You can now get to the information you care about most, in fewer steps; one click access to your webmail, favorite news sites or other online services.
  • Easier Reduce the steps to accomplish many common tasks, and automate your access to real time information updates. You can keep track of your favorite sports team, news, weather with a single click.
  • More Private Helps protect your privacy and confidential information where ever you go on the web.
  • More Secure Helps protect and stop malicious software from reaching your PC, and makes it easier to detect when a website is an imposter.


Support for IE8 can be received by visiting the Internet Explorer Newsgroup to discuss issues, or by contacting Customer Support Services.

If you use a screen reader, please consult the Internet Explorer 8 release notes before downloading.
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Windows Internet Explorer 9 Enhanced with Bing & MSN

Windows Internet Explorer 9 has a streamlined look and many new features that speed up your web browsing experience. We give you more screen space to see your favorite sites, more than any other browser. The new tab page intelligently displays you most visited sites. A combined search and address bar means you can search and navigate from one place. With Pinned Sites, you can get to your favorite sites directly from the Windows 7 taskbar—without having to open Internet Explorer first. All together, making Internet Explorer the best way to browse your favorite sites.
  • Windows Vista

  • Internet Explorer 7 or later

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Windows Internet Explorer 9 Enhanced with Bing & MSN

Windows Internet Explorer 9 has a streamlined look and many new features that speed up your web browsing experience. We give you more screen space to see your favorite sites, more than any other browser. The new tab page intelligently displays you most visited sites. A combined search and address bar means you can search and navigate from one place. With Pinned Sites, you can get to your favorite sites directly from the Windows 7 taskbar—without having to open Internet Explorer first. All together, making Internet Explorer the best way to browse your favorite sites.
  • Windows 7

  • Internet Explorer 7 or later

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Microsoft® Windows® Malicious Software Removal Tool (KB890830)

The Microsoft Windows Malicious Software Removal Tool checks Windows Vista, Windows 7, Windows XP, Windows 2000, and Windows Server 2003 computers for and helps remove infections by specific, prevalent malicious software—including Blaster, Sasser, and Mydoom. When the detection and removal process is complete, the tool displays a report describing the outcome, including which, if any, malicious software was detected and removed. The tool creates a log file named mrt.log in the %WINDIR%\debug folder.

To download the x64 version of Malicious Software Removal Tool, click here.

This tool is not a replacement for an anti-virus product. To help protect your computer, you should use an anti-virus product.

Microsoft will release an updated version of this tool on the second Tuesday of each month. New versions will be made available through this web page, Windows Update, and the Malicious Software Removal Tool Web site on Microsoft.com.

To have the newest versions automatically delivered and installed as soon as they are released, set the Automatic Updates feature to Automatic. The version of this tool delivered by Windows Update runs on your computer once a month, in the background. If an infection is found, the tool will display a status report the next time you start your computer. If you would like to run this tool more than once a month, run the version that is available from this Web page or use the version on the Malicious Software Removal Tool Web site.

Please review KB890830 for the list of malicious software that the current version of the tool is capable of removing as well as usage instructions. Also, please be aware that this tool reports anonymous information back to Microsoft in the event that an infection is found or an error is encountered. The above KB article contains information on how to disable this functionality and what specific information is sent to Microsoft.

It is strongly recommended that you review KB891716 before you consider deploying this tool in an enterprise environment.

The user must be an administrator to run this tool. This tool will not run on any version of Windows 98, Windows ME, or Windows NT 4.0.

Note that this download is now a multi-lingual tool. For all supported languages, the same tool will show the correct language depending on the language of the operating system.


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Windows® Defender

This is the most current release of Windows Defender. If Windows Defender informed you that an update is available, you are running an older version. We encourage you to upgrade to this version. You can check your version of Windows Defender by clicking the down arrow next to the help icon and choosing ‘About Windows Defender’.

This release includes enhanced features that reflect ongoing input from customers, as well as Microsoft’s growing understanding of the malicious software landscape.

To download the x64 version of Windows Defender, click here.

Specific features of Windows Defender include:

  • A redesigned and simplified user interface – Incorporating feedback from our customers, the Windows Defender UI has been redesigned to make common tasks easier to accomplish with a warning system that adapts alert levels according to the severity of a threat so that it is less intrusive overall, but still ensures the user does not miss the most urgent alerts.

  • Improved detection and removal – Based on a new engine, Windows Defender is able to detect and remove more threats posed by spyware and other potentially unwanted software. Real Time Protection has also been enhanced to better monitor key points in the operating system for changes.

  • Protection for all users – Windows Defender can be run by all users on a computer with or without administrative privileges. This ensures that all users on a computer are protected by Windows Defender.

  • Support for 64-bit platforms and accessibility - Windows Defender supports accessibility and 64-bit platforms. Please be sure to use WindowsDefenderX64.msi for 64-bit platforms.

  • Delta definition updates - Windows Defender now downloads smaller delta definition updates when possible which reduces the time required to download and install definition updates. Customers can expect shorter download times when updating their definition updates.

  • Free Limited Support - As a part of our commitment to the security of our customers, Microsoft is offering two free support incidents relating to Windows Defender on Windows XP and Windows Server 2003. Examples of valid support scenarios are installation, configuration, definition update, detection and removal errors. Please refer to the Windows Defender support policy for more information.

  • WGA enforcement - There are significant risks to running non-genuine Windows. Only genuine Windows customers can receive product downloads, Windows updates and special offers. Windows Defender will validate that your copy of Windows is genuine before installation. Furthermore, Windows Defender will only remove Severe threats for machines that are not genuine. Low, Medium and High threats will be detected, but not removed unless your copy of Windows is genuine. For more information, please visit The Windows Genuine Advantage.



Important Notes

  • Windows Defender no longer supports Windows 2000 as it went out of mainstream support in June 2005. Please refer to the support lifecycle website for more information.


  • Access to Newsgroups:
    In addition to phone support we also have newsgroups to help get your questions answered.

For Additional Information:
Please see the Release Notes to learn more about known issues with Windows Defender.
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What happens if I don't install the Microsoft Download Manager?

Generally, a download manager enables downloading of large files or multiples files in one session. Many web browsers, such as Internet Explorer 9, include a download manager. There are many stand-alone download managers available as well, including the Microsoft Download Manager.

However, if you do not have a download manager installed, and still want to download the file(s) you've chosen, please note:

  • You may not be able to download multiple files at the same time. In this case, you will have to download the files individually from the "Thank you for downloading" page.
  • Files larger than 1 GB may take much longer to download and might not download correctly.
  • You might not be able to pause the active downloads or resume downloads that have failed.
  • Files may be more difficult to download or take longer to download.