and Windows Workflow Foundation (WF) updates. Why Use the Offline Installer?
If you attempt to install .NET Framework 4.5 on Windows 7 RTM (no SP1), the installer will block installation and prompt you to install SP1 first. microsoft net framework 4.5 offline installer for windows 7
.NET 4.5 is not backward compatible with .NET 3.5 or 2.0. If you need older applications, you must install those separately (via Windows Features). Conversely, .NET 4.5 is forward-compatible with .NET 4.5.1, 4.5.2, 4.6, and 4.7 (most apps built on those will run on 4.5). and Windows Workflow Foundation (WF) updates