Download Net Framework 3.5 Windows 10 64 Bit Offline Installer ((top)) -

The target machine is completely air-gapped or offline.

: Type the following command, replacing D: with your actual drive letter, and press Enter : DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs . Alternative: Official Download Links (Online Requirement)

If the standalone package throws an error, the absolute most reliable offline method is using your original Windows 10 installation media (USB or ISO file). Windows 10 inherently carries the .NET 3.5 deployment files inside its sources\sxs directory. Step 1: Mount your Windows 10 Media Locate your file.

The safest way to acquire the standalone package for environments that eventually connect to the internet, or for transferring via USB drive, is through the official Microsoft download portal. Navigate to the official Microsoft Download Center.

While Microsoft provides a simple online installer for the .NET Framework, it's not always reliable. For IT professionals managing computers in controlled environments or for any user who has experienced a failed installation, the offline methods described here are the most dependable ways to get .NET Framework 3.5 installed on Windows 10. The target machine is completely air-gapped or offline

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

If you do not have Windows 10 installation media, you must download the official offline executable file from Microsoft using a device that has internet access. You can then transfer this file to your offline 64-bit Windows 10 PC via a USB flash drive.

D:\sources\sxs

Copy and paste the following command into the prompt (replace D: with your actual mounted drive letter): Windows 10 inherently carries the

Locate at the top of the list. Check the box next to it and click OK . Choose Let Windows Update download the files for you . Restart your computer once the process finishes. Method 3: Using Third-Party Offline Installer Tools

Confirm your system type by navigating to Settings > System > About and checking the "System type" field. Method 1: The Official Microsoft Offline Runtime Package

This method uses the Deployment Image Servicing and Management (DISM) tool to pull the necessary files directly from your Windows 10 installation media (ISO) without needing the internet. Step 1: Mount the Windows 10 ISO Locate your on your computer. Right-click the ISO file and select Mount .

Type reg query "HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5" and hit . Navigate to the official Microsoft Download Center

While Microsoft provides a "Full Package" offline installer, it is primarily designed for older OS versions like Windows XP or Vista and may still trigger a download request on Windows 10. learn.microsoft.com Official Link : You can find the Microsoft .NET Framework 3.5 Service Pack 1 (Full Package) Official Microsoft Download Center Important Note

If you find command-line tools complicated, community developers have created lightweight, automated scripts that handle the extraction process for you.

/enable-feature /featurename:NetFX3 : Tells Windows to turn on the .NET Framework 3.5 feature.

Type the path to the sxs folder on your mounted ISO: D:\sources\sxs (replace D: with your ISO drive letter). Click and follow the prompts. Troubleshooting Installation Errors

Point the application utility to your drive letter and click . The tool will run the background DISM commands automatically. Troubleshooting Common Installation Errors