Type the following command, replacing D: with your mounted drive letter:
Open Command Prompt as Administrator (right-click Start button > Terminal (Admin) > choose Command Prompt). .net 3.5 offline installer windows 11
Keep a Windows 11 USB drive handy. With the simple DISM command above, you can enable .NET 3.5 on any offline Windows 11 machine in under five minutes, ensuring your classic applications run smoothly without an internet connection. Have a question about deploying .NET 3.5 across multiple offline machines? Let us know in the comments. Type the following command, replacing D: with your
If you are a developer, a gamer running classic titles, or an enterprise user maintaining legacy software, you have likely encountered the dreaded prompt: “This application requires .NET Framework 3.5.” Have a question about deploying
Inside the mounted drive, navigate to the sources\sxs folder. You should see a file named microsoft-windows-netfx3-ondemand-package.cab . This is the offline source.
Copy the ISO to your offline Windows 11 PC (via USB). Double-click the ISO file to mount it as a virtual DVD drive. Note the drive letter (e.g., D: ).
Published: April 13, 2026 | Reading Time: 4 minutes