While version 4.5 was the initial release, Microsoft highly recommends installing the later, more secure sub-versions (4.5.1 or 4.5.2) which are fully compatible with Windows 7 SP1.
Windows 8 and 10 come with .NET 4.5 pre-installed. This article is specifically for Windows 7. If you see that on Windows 7, you have a previous version (e.g., 4.0). Uninstall via Control Panel and retry. While version 4
The Microsoft .NET Framework 4.5 offline installer is a redistributable package that installs the .NET Framework runtime and associated files required to run applications developed for the .NET Framework 4.5. If you see that on Windows 7, you have a previous version (e
The 4.5 release introduced several critical performance and functional improvements over version 4.0: Asynchronous Programming : Enhanced support for keywords, leading to more responsive user interfaces. Performance you have a previous version (e.g.
: A highly compatible update that specifically addresses connectivity issues with an offline package Microsoft .NET Framework 4.5.2