Download Net Framework 35 Offline Installer For Windows 10 11 Free May 2026

If you have a stable internet connection, this is the simplest method, but it is not truly "offline."

This method works 100% offline. You will need a Windows 10 or 11 ISO file (same version as your installed OS).

Microsoft provides a direct, trusted offline installer for .NET Framework 3.5 SP1. If you have a stable internet connection, this

Note: This installer may still try to fetch some components from Windows Update. If that fails, use Method 2.

After installation, test it by pressing Win + R, typing regedit, and navigating to: Note: This installer may still try to fetch

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5

If Version exists and Install = 1, you’re done.

You can now run your legacy software without an internet connection. After installation, test it by pressing Win +

Important: Do not download random “.NET 3.5 installer” EXE files from third‑party websites – they may contain malware. Use Microsoft’s official sources (Windows media or the method below).