Reference info on Node.js
Here are the key facts regarding the current state of .NET Framework versions:
If you are looking for an offline installer for the most recent supported version, here is the information for the .NET Framework 4.8.1 Offline Installer .NET Framework 4.8.1 Offline Installer .NET Framework 4.9 Offline Installer for Windows
The /q option performs a quiet installation, and /norestart prevents the system from restarting after installation. Here are the key facts regarding the current state of