Microsoft Net Framework 4.5 Offline Installer For Windows 7 64 Bit (Direct Link)

This single executable contains both 32-bit and 64-bit components. It will automatically detect your Windows 7 64-bit OS and install the correct files.

Many .NET 4.5 features require Windows 7 SP1. Ensure your OS is updated. This single executable contains both 32-bit and 64-bit

Follow the on-screen prompts, accept the license agreement, and click Install . accept the license agreement

Copy the offline installer to a network share or USB. Then run: it is safe. For online machines

Security-wise, Microsoft ended mainstream support for .NET 4.5 on January 12, 2016. Extended support ended in 2021. However, if you are running it on an isolated Windows 7 machine (no internet), it is safe. For online machines, consider upgrading to .NET 4.8 (which still receives security updates on Windows 7 until Windows 7 ESU ends).