For Windows 10 and 11, there is no longer a standard standalone ".exe" offline installer for .NET Framework 3.5
Double-click .
Here, <path_to_source> represents the location of the .NET Framework 3.5 source files, which you can download from Microsoft's official website.
You are setting up a secure, air-gapped machine.
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:C:\netfx3.cab For Windows 10 and 11, there is no
Even in 2026, many applications depend on this specific framework version. Common scenarios include:
Starting with Windows 11 Build 28000 and later, .NET 3.5 has moved to a standalone deployment model. You may need specific builds from the official .NET download site depending on your OS version.
To verify that your installation was successful without launching your third-party app, you can check the registry or run a quick command. Open as an administrator. Run the following command: powershell Get-WindowsCapability -Online -Name "NetFX3~~~~" Use code with caution.
In the rapidly evolving landscape of software development, newer isn’t always synonymous with "only." While Windows 10 and 11 come pre-equipped with advanced versions of the .NET ecosystem, the legacy remains a critical component for millions of users. Whether you are a gamer trying to launch a classic title or a professional running specialized enterprise software, this framework often acts as the indispensable bridge between older code and modern operating systems. Why .NET 3.5 Still Matters To verify that your installation was successful without
dism /online /enable-feature /featurename:netfx3 /all /source:D:\sources\sxs /limitaccess
Method 1: The Best Way - Using Windows 10/11 ISO (No Download Needed)
Type optionalfeatures and press . This opens the Windows Features window.
Locate your Windows 10 or Windows 11 ISO file in File Explorer. Right-click the ISO file and select . which often fails
Which version of you are running (Home or Pro).
Download a trusted offline installer. A well-known option is the dotNetFx35W10 GitHub repository . Extract the downloaded ZIP file.
When you try to run these legacy apps, Windows might prompt you to download it, which often fails, or you may be in an offline environment. This guide provides the complete methods to download and install the for Windows 10 and 11. What is .NET Framework 3.5 and Why Do You Need It Offline?