A default installation of Windows 10 contains the .NET 4.7 framework which is not compatible with the .NET legacy frameworks 2.0 - 3.5. In course to support software which depend on .NET 3.5 the framework needs to be installed manually.
Start (or press the Windows key)windows featureTurn Windows features on or off should show up. Open it. .NET Framework 3.5 (includes .NET 2.0 and 3.0) and click OK