The specific version is the build number for the .NET Framework 4.0. It was released in April 2010 alongside Visual Studio 2010. The number 30319 represents the specific compilation (or "build") of the Common Language Runtime (CLR).
But here is the common user dilemma: When you try to install it via the web, you often hit slow downloads, corrupted files, network errors, or the dreaded "Unable to connect to the Internet" message. This is why searching for the is the smartest move you can make. The specific version is the build number for the
dotNetFx40_Full_x86_x64.exe /q /norestart you often hit slow downloads