Failed to install

When I start Infinity-setup.exe, it starts the installation but displays some seconds after an error: Installation has failed, Failed to install the .NET Framework, try installing the latest version manually.

I have already updated my pc but the error persists. When I want to install the latest version (4.7), he tells me that my system is not intended for.
Help me plz

What version of windows are you on? 4.7 removed support for a lot of OS.

i have resolved the problem with windows 8.1