Microsoft does not provide a standalone offline installer for .NET Framework 3.5 on Windows 10. The recommended method is the DISM command above. For deployment tools or advanced users, the required files are located at sources\sxs on the Windows 10 installation media.
One afternoon, Alex tried to launch a beloved vintage photo editor. Instead of the familiar splash screen, a cold, grey box appeared: Microsoft does not provide a standalone offline installer
Leo was in a panic. His internet had gone down during a thunderstorm, and he was right in the middle of installing an old but beloved CAD software his engineering firm still used. The installer had stopped dead with the dreaded yellow triangle: Microsoft does not provide a standalone offline installer