This is the "pro" way to do it. It uses your Windows installation media (ISO or USB) as the source for the files, bypassing the need for an internet connection entirely.
—a legacy artifact that refuses to die because of how many older business applications still depend on it. YouTube +1 The Developer's Dilemma Many users and IT admins share the "story" of downloading the supposedly "full" 231MB offline installer (Service Pack 1), only to find that it still demands an internet connection once they run it. For those in air-gapped environments or behind strict corporate firewalls, this becomes a frustrating loop: Microsoft Learn +1 The Trap: You download the net framework 3.5 offline installer 64 bit
Open by right-clicking the Start button. This is the "pro" way to do it