When you download .NET from Microsoft, you are usually offered a small "Web Installer" file (around 1-2 MB). This file then downloads the actual components during the installation process.
You are trying to install on an unsupported OS version (e.g., Windows 7, Windows 8, or old Windows 10 builds like 1507/1511). microsoft .net framework 4.8.1 offline installer
: Enables .NET Framework applications to run natively on Arm64 devices (like Surface Pro X) without needing x64 emulation, leading to significant performance gains. When you download