Net Framework 4.0 installation

If I install the last NET 4 it replaces all others or do I still need net framework 1.0 1.1 2.0 3.0 and 3.5 do I have to have all of them in order of running .net programs. This has always confused me and I end up having several different versions and service packs for .NET Framework is installed. Which ones should I really just run .net programs.

Hello

Thank you for contacting Microsoft Community.
Installation of .net Framework 4.0 is not install all previous versions also. You must install all previous versions individually, if any program needs. For example. installation of .net Framework 4.0 does not solve the need for .net Framework 2.0; You need to install .net framework 2.0 separately. In addition, there is no restriction in the method of installation of .net Framework (that is, install the lower version, then install the highest version), but you can install any version at any time.
Service packs are essential as they are updated (for the most part, security) to existing versions.

Tags: Windows

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