Installing .NET Framework 3.5 (which includes .NET 2.0 and 3.0) on Windows 10 offline requires the original installation media (ISO, USB, or DVD). Modern Windows versions do not support a single, standalone ".exe" offline installer for this specific component. Direct Offline Installation Method (DISM)
Installing .NET Framework 3.5 on Windows 10 can be tricky without an internet connection. Most standard methods rely on Windows Update, which will fail if you are offline. However, you can use the Deployment Image Servicing and Management (DISM) tool to install it using your original Windows installation media. 🛠️ Prerequisites Before starting, ensure you have: A Windows 10 ISO file or a Windows 10 installation DVD/USB. Net Framework 3.5 Offline Installer Windows 10 64 Bit
If you see a version number, success.
This method uses your Windows 10 ISO or bootable USB drive as a local source for the installation files. 1. Prepare Your Installation Media Install .NET Framework 3.5 on Windows 10 - Microsoft Learn Installing
This forces the installer to look locally first. If it fails, fall back to DISM. Error: “The source files could not be found
State should be Enabled.
Since Windows 10 64-bit already contains the necessary source files in its installation media, the best "offline installer" is actually your original Windows 10 ISO or USB drive. Method 1: Using the DISM Command (Recommended)