A: No. .NET 3.5 and .NET 4.8 (the modern version) run side-by-side. Installing version 3.5 will not affect newer apps or games.
You just tried to install an older game, a legacy accounting tool, or a specialized piece of engineering software. Suddenly, you are greeted by this pop-up: windows 10 download .net framework 3.5
Windows will reach out to Windows Update, grab the necessary files, and install them. This takes about 2 minutes. Once done, restart your software. a legacy accounting tool
A Windows 10 USB drive or an ISO file mounted as a drive (right-click the ISO > Mount). grab the necessary files
