Thoughts about setup and deployment issues, WiX, XNA, the .NET Framework and Visual Studio
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with no warranties, and confer no rights. Additionally, views expressed
herein are my own and not those of my employer, Microsoft.
The .NET Framework setup team has released an updated version of the .NET Framework Repair Tool that adds support for diagnosing and repairing issues with .NET Framework 4.5 and 4.5.1. This repair tool can identify and fix issues with the installation of MSI-based versions of the .NET Framework, but it cannot fix issues related to versions of the .NET Framework that are installed as a part of Windows.
If you run into installation issues with the MSI-based versions of the .NET Framework 2.0 SP2, 3.0 SP2, 3.5 SP1, 4, 4.5 or 4.5.1, I strongly encourage you to download the .NET Framework Repair Tool and run it to see if it resolves your issue before resorting to trying the .NET Framework cleanup tool. Here are links that you can use to find additional information about the .NET Framework Repair Tool:
I was recently asked a question about how to silently repair and uninstall the .NET Framework 4.5 and .NET Framework 4.5.1. I couldn’t find these command lines documented anywhere else, so I updated my blog post that contains silent repair and uninstall command line switches for all versions of the .NET Framework to include information about the .NET Framework 4.5 and 4.5.1 too. You can find the updated blog post at http://blogs.msdn.com/b/astebner/archive/2009/04/16/9553804.aspx.