Microsoft .net Framework 4.8.1 Offline Installer ((better)) -

Microsoft .NET Framework 4.8.1 Offline Installer: Everything You Need to Know

Startup: It runs a quick system check.
Process: It extracts a significant number of files and updates system components.
Reboot: You will almost certainly need to restart your PC. While it takes a few minutes, the speed is consistent because it isn't limited by your download bandwidth.

Key Features and Benefits