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After running any of the methods above, you can easily confirm that .NET Framework 3.5 is fully functional: Open or PowerShell as an administrator.
The files are specifically located in the \sources\sxs folder of your media. 3. Quick Online Activation If you do have internet but just need the feature enabled: Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
The process will start, and upon reaching 100%, .NET Framework 3.5 will be installed. After running any of the methods above, you
Once you hit Enter, you will see a progress bar. The process typically takes 1 to 3 minutes to hit 100% , culminating in an "The operation completed successfully" confirmation message.
| Method | What You'll Need | Best For... | | :--- | :--- | :--- | | | A Windows 10 or 11 ISO file, or a bootable USB/DVD matching your current Windows version | A highly reliable, Microsoft-recommended method that's great if you already have installation media | | 📦 Using the Standalone NetFx3.cab File | Just a single .cab file specific to your system's architecture | The simplest and fastest method, ideal if you want to download a small file once and use it for multiple PCs | Quick Online Activation If you do have internet
Transfer this file via a USB flash drive to the offline computer.
If you have a Windows 10 or 11 ISO file or USB recovery drive, you can install .NET 3.5 completely offline using the tool. | Method | What You'll Need | Best For
Look at the column. If it displays Installed , your software applications and games will now launch seamlessly without prompting you for further framework downloads.
You do not need to purchase software or use risky third-party download portals to get the .NET Framework 3.5 offline installer. By utilizing the DISM tool alongside your original Windows 10 or 11 installation media, you can safely enable this framework on any offline computer completely free of charge.
Only get .NET 3.5 from Microsoft (via ISO) or from your original Windows installation media.
