Download |verified| Net Framework 3.5 Windows 10 64 Bit Offline Installer May 2026

To install .NET Framework 3.5 on Windows 10 (64-bit) without an active internet connection, the most reliable method is using the Deployment Image Servicing and Management (DISM) tool alongside a Windows 10 ISO or installation media. Standard standalone installers from Microsoft often still require an internet connection to "verify" or download additional bits on modern Windows versions. Offline Installation Using Windows 10 ISO

dism /online /enable-feature /featurename:NetFX3 /all /source:D:\sources\sxs /limitaccess To install

Security notes

Use official Windows installation media matching your installed Windows build.
Do not download third-party or unknown “offline installers” from untrusted websites.

Wait for completion. If successful, DISM reports success and .NET 3.5 will be enabled.

Verify by running:

dism /online /Get-Features | findstr /i NetFx3

or check Control Panel > Programs and Features > Turn Windows features on or off.