This method is Microsoft-supported, requires no active internet connection on the target machine, and works exclusively for 64-bit versions of Windows 10.
/enable-feature /featurename:NetFX3 : Specifies that you want to enable the .NET Framework 3.5 feature.
: Temporarily disable Windows Update group policies that restrict optional feature installations.
Open and note the drive letter assigned to the mounted media (for example, drive D: or E: ). Step 2: Run the DISM Command
, replacing D: with the actual drive letter of your installation media:
The methods above work identically for 32-bit (x86) systems, just ensure your source ISO matches your architecture. Open and note the drive letter assigned to
The DISM tool will start extracting files and installing the framework directly from the media. The progress bar will reach 100%, and you will see a message stating, "The operation completed successfully."
How to Install .NET Framework 3.5 on Windows 10 Without an Internet Connection
And the machine lived happily—and compatibly—ever after.
Although Windows 10 comes with the .NET Framework 4.6.1 or later versions pre-installed, some older applications may still require .NET Framework 3.5 to function properly. If you're trying to run an application that depends on .NET Framework 3.5, you'll need to download and install it separately.
Open Command Prompt as Administrator.
Copy and paste the following command into the prompt (replace D: with your actual mounted drive letter):
Are you seeing a (like 0x800F0906 or 0x800F081F)? Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
These errors typically indicate that Windows cannot find the source files or is being blocked by group policies.
You can safely download the full package directly from the official Microsoft portal:
– a standalone .cab or .exe file that contains all the necessary components. You can copy it to a USB drive, use it on multiple PCs, or install without an internet connection. The progress bar will reach 100%, and you
: On modern Windows 10 versions, even this package may sometimes request a connection to "download and install this feature" during setup. The DISM method above is more guaranteed for strictly offline environments. Important Considerations Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
If your installation fails, it is typically tied to misconfigured paths or security permissions. Error Code 0x800F0906 or 0x800F081F
If you need help resolving a specific during the installation, or if you need to know how to deploy this across a local corporate network , please let me know! Share public link
Open the (search "cmd" in the Start menu, right-click, and select "Run as administrator").