Net Framework 4.3 Offline Installer [work] -

.NET Framework 4.x versions are in-place updates. You cannot install 4.5.2 after 4.8, for example. Fix: You do not need to. Later versions are backward compatible. Install the latest version your OS supports.

https://dotnet.microsoft.com/en-us/download/dotnet-framework/thank-you/net48-offline-installer net framework 4.3 offline installer

Based on typical requirements mislabeled as “4.3”: net framework 4.3 offline installer

Use the /quiet or /passive switch. Example: NDP472-KB4054530-x86-x64-AllOS-ENU.exe /quiet /norestart Then push via Group Policy or SCCM. net framework 4.3 offline installer

Direct link: https://go.microsoft.com/fwlink/?linkid=2088631 (x64)