: You can often find legacy framework packages by searching the Microsoft Update Catalog Visual Studio Subscriptions
dotnetfx45-full-x86-x64.exe /log C:\Deployment\Net45_Install.log /passive
to apply all system modifications and activate the environment variables. Advanced Deployment: Silent Installation Switches download dotnetfx45-full-x86-x64.exe offline installer
Read and accept the Microsoft Software License Terms, then click .
: Standard web installers act as a "stub" (usually under 1 MB) that pulls files from Microsoft's servers during installation. The offline installer contains all the payloads locally (typically between 48 MB to 68 MB) and completes the full install without needing an active internet connection. : You can often find legacy framework packages
Right-click the executable and select "Run as Administrator" to ensure the installer has the necessary permissions to modify system files.
This single installer works for both 32-bit (x86) and 64-bit (x64) architectures. Important Considerations The offline installer contains all the payloads locally
You are trying to install .NET 4.5 on a base Windows 7 machine without Service Pack 1, or on a modern OS like Windows 10/11 where a newer version is already active.