Hello! everyone
I am trying to install AX 2012 on client's server , But facing some issues in prerequisite installing of sharepoint 2013
when I am trying to install the Sharepoint 2013 then , it has its own prerequisites , which needs to be installed first for it to be installed, one of which is .NET framework 4.5
but is already installed as I can see it in server manager and also when I am trying to reinstall it says "same or higher version is already installed on the system" 
please let me know if some one has any solution have or faced anything ?