and note the drive letter assigned to the mounted ISO or USB (e.g.,

To install .NET Framework 3.5 (which includes .NET 2.0 and 3.0) on Windows 10 64-bit without an internet connection, you must use the original Windows 10 installation media (ISO or USB). Windows 10 does not come with a pre-packaged standalone "offline installer" exe in the traditional sense; instead, the necessary files are stored in the sources\sxs folder of your installation media. Microsoft Learn Method 1: Using DISM (Command Prompt)

Share this guide with your IT team or save it for your next Windows refresh cycle. If you found this article helpful, consider bookmarking it – because the next time you reformat Windows, you will need this offline installer again.

The .NET Framework 3.5 is a software framework developed by Microsoft that provides a large library of pre-built functionality, programming tools, and a virtual execution environment for developing and running Windows-based applications. This framework is essential for running various applications, including games, business software, and other Windows-based programs.

Need .NET Framework 3.5 on a Windows 10 (64-bit) machine without internet access? Follow this quick offline installer guide.