How can I install .NET Framework 3.5 on Windows 7?

Microsoft .NET Framework version 3.5.1 is included with Windows 7. Follow the steps below to enable it.

If you try to run .NET 3.5 installer downloaded from the Microsoft website on Window 7, you will receive the following error: You must use "Turn Windows features on or off" in the Control Panel to install or configure Microsoft .NET Framework 3.5 SP1. Instead of running the installer, follow instructions on this page.

Note: The same steps work for Windows 8 and Windows 10.

1. Click Start -> Control Panel

   

2. Click Programs

   

3. Click Turn Windows features on or off

   

4. Click the checkbox next to Microsoft .NET Framework 3.5.1

   

5. You will see the checkbox become filled

   

6. Click OK

   

7. Wait for Windows to complete the operation. If it asks you to connect to Windows Update to download required files, click Yes.

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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.

I need to install version 3.5 of the .NET Framework in Windows 7, but when I try to install it, it shows the following error:

"Turn on/off .NET Framework" option in System Features

I tried doing this, but I don't understand what it means. Can anyone help me?

Cody Gray

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asked Mar 7, 2011 at 9:19

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That message is trying to tell you that you need to install .NET 3.5 a different way under Windows 7. Because it's included as part of the operating system, you use the "Turn Windows features on or off" function to get to it, instead of installing a downloaded redistributable package.

1. Open the Start menu and click "Control Panel".
2. Under the "Programs" category, click the "Turn Windows features on or off" link text.

answered Mar 7, 2011 at 9:25

Cody GrayCody Gray

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Run the following command as an admin:

DISM /Online /Enable-Feature /FeatureName:NetFx3 /NoRestart

That'll install .NET Framework 3.5 SP1, 3.0 SP1, & 2.0 SP1 ... same as enabling it through the GUI in Control Panel.

answered Mar 7, 2013 at 18:51

VertigoRayVertigoRay

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You may disable/re-enable the Microsoft .NET Framework 3.5.1 within the Control Panel to effectively repair it:

Control Panel > Programs and Features > Turn Windows feature on or off.

Uncheck the Microsoft .NET Framework 3.5.1 entry. Click OK to accept this setting and return to Turn Windows Features on or off to re-enable Microsoft .NET Framework 3.5.1 by checking the box.

answered Apr 1, 2014 at 10:59

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Windows 7 comes with .NET 3.5 you just need to enable it in Windows Features.It gets installed,it selects automatically what else needs to be installed

answered Mar 7, 2011 at 9:24

abmvabmv

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