Pro tip: Even though the page says "Microsoft .NET Framework 3.5 SP1," this is the full offline installer.
This is the gold standard for IT pros. If the standard EXE fails, use DISM (Deployment Imaging Servicing and Management). But you still need the offline source files. net framework 3.5 sp1 offline installer
You likely also need a specific update (KB4474419) if you are on an older Service Pack level, as SHA-1 code signing was deprecated. Pro tip: Even though the page says "Microsoft
Download once and install on multiple PCs via USB or network drive. net framework 3.5 sp1 offline installer