The information in this article applies to:
Security Explorer 8.1.x
Security Explorer installation prompts for .NET Framework when it has already been installed.
Security Explorer starts but then it will not proceed with the installation due to .NET Framework 4.0 error message indicating that it needs to be installed.
This error will occur if .NET Framework installed with Client Profile only.
Security Explorer 8.1.x requires a .NET Framework Full or Standalone installation. This can be confirmed after the installation by checking the Programs and Features or Add/Remove programs, depending on the operating system.