I forgot to comment.
one of my dlls was missing functions
I replaced it, repaired the installation and went to 4.8.
There were no problems :)
On some of my computers in Windows 7, I get the following error while installing Framework 4.7
nextafterf procedure entry point not found in dynamic link library MSVCR120_CLR0400.DLL
But, when I install . NET 4.7 , I get the following error nextafterf procedure entry point not found in dynamic link library MSVCR120_CLR0400.DLL
I also remove C ++ 2013 X86, X64 and reinstalled, but it doesn't change anything
Do you have a solution?