Download Net Framework 3.5 Windows 10 64 Bit Offline Installer

Warning: Do not download from third-party "download manager" sites. They often bundle malware or outdated versions. Always use official Microsoft sources.

After installation, confirm everything works. Warning: Do not download from third-party "download manager"

Or simpler:

For large-scale deployments, use the same DISM command inside a script or task sequence. Or simpler:

If you want, I can provide the exact DISM/PowerShell commands tailored for your drive letter and Windows build. For large-scale deployments, use the same DISM command

Microsoft .NET Framework 3.5 is a legacy software framework required for many older applications (e.g., certain CAD software, ERP systems, and games). While Windows 10 includes the installation files, a standard online installation requires downloading components from Windows Update. An offline installer is essential for systems without internet access or those needing a repeatable, local deployment.