Before you proceed, ask yourself: Does my application absolutely need version 1.1?
Most legacy applications requiring version 1.1 will run successfully if version 3.5 is enabled. Microsoft Learn Control Panel and select Programs and Features Turn Windows features on or off Check the box for .NET Framework 3.5 (includes .NET 2.0 and 3.0) and allow Windows Update to download the necessary files. your computer. Microsoft Learn Advanced Method: Slipstreaming 1.1 and SP1 download net framework 1.1 windows 10 64-bit