Check the box next to .
(Replace D: with your mounted ISO drive letter) Check the box next to
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 Check the box next to
Visit the official Microsoft Download Center. Search for the ".NET Framework 3.5 Service Pack 1 (Full Package)." Download the standalone offline executable ( dotnetfx35.exe ). Step 2: Run the Installer Check the box next to
Type or paste the following command into the window. Replace the letter D: with the actual drive letter of your mounted installation media: