Ensure you are using the true standalone offline package ( dotNetFx40_Full_x86_x64.exe ) and not the stub web installer ( dotNetFx40_Client_x86_x64.exe ). "Installation Did Not Succeed" / Generic Failure
For a Windows 7 user, the offline installer is often the most reliable method of installation. Unlike the web installer, which needs a constant internet connection to download files during installation, the offline installer comes as a single, self-contained setup file. This is crucial for systems that are not connected to the internet, have slow or unreliable connections, or when you need to deploy the framework on multiple machines. net framework 40 3019 windows 7 32 bit offline