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use Method 1 (DISM) as the framework files are already technically present in the Windows "Side-by-Side" ( ) folder on your installation media. www.microsoft.com
To install .NET Framework 3.5 offline on Windows 10 64-bit , you must use the original Windows 10 installation media (ISO or USB) rather than a standalone installer file, as the standard offline installer package often fails on newer Windows versions without pre-existing components. learn.microsoft.com Method 1: Offline Installation via DISM (Recommended) This method uses the sources\sxs use Method 1 (DISM) as the framework files
: If you don't have an ISO, you can download one using the official Microsoft Media Creation Tool on another computer with internet access. Official Downloads : While Microsoft offers a legacy web installer Official Downloads : While Microsoft offers a legacy
While Microsoft provides a standard .NET Framework 3.5 web installer you can verify it's active:
Once the progress bar reaches 100%, you can verify it's active: