VS 2012/Silverlight 5 .net 4.7 not installed

I have an older Silverlight project using VS 2012 that I need to make some changes to, when I open it in VS 2012 I get the error indicating that the project is targeting the 4.7 framework and that it's not installed, do I want to download it.

The current framework installed is 4.7.1, but VS cannot detect it, what could be causing this. I have confirmed that 4.7.1 is installed.

I also have .Net Core installed but I don't see why that would interfere.

Thanks