You want to save data by downloading the installer once and deploying it across multiple computers.
If you do not have the original Windows 10 media, you can download the redistributable package from a machine that has internet and move it to your 64-bit Windows 10 system. Visit the official Microsoft Download Center. Search for ".NET Framework 3.5 Service Pack 1". Download the full package (approximately 231 MB). Transfer the file via USB to your offline Windows 10 PC. Run the installer as an administrator. Troubleshooting Common Errors Error 0x800F0906 or 0x800F081F
If the files are cached locally on your hard drive, Windows will configure the feature without requesting an internet connection. Troubleshooting Common Offline Installation Errors You want to save data by downloading the
Click the red button to grab the standalone installer package ( dotnetfx35.exe ).
Replace the X: in /Source:X:\sources\sxs with the actual drive letter of your Windows 10 media noted in Step 1. (For example, if your USB is drive E , the path must read /Source:E:\sources\sxs ). Press Enter . Search for "
Verify that the source files exist on the media. Navigate to the mounted drive and open the folders: [Drive Letter]:\sources\sxs . You should see a file named microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab . Step 3: Run the DISM Command
To install on a Windows 10 64-bit system without an active internet connection, you must use a local source such as Windows 10 installation media (ISO or USB). This process uses the Deployment Image Servicing and Management (DISM) tool to enable the feature. Offline Installation Steps Install .NET Framework 3.5 on Windows 10 - Microsoft Learn Run the installer as an administrator
This error, "The source files could not be found," is also extremely common when you try to use the DISM command. How to fix it: This almost always indicates a simple typo or issue with the path in your command.
For Windows 10, the official method to install (which includes .NET 2.0 and 3.0) without an internet connection is to use the DISM tool paired with your original Windows 10 installation media.
In simple terms, the Microsoft .NET Framework is a development platform that provides the environment for many applications to run. Think of it like an engine for your car; without it, the car just won't move. You can try to run an application built on an older version of .NET while only having the latest version installed, and it will almost certainly refuse to launch.