rgd1101 :
which version of VS?
does the file exist in that directory?
did you run VS as administrator?
also did you google the error?
https://www.visualstudio.com/ --> Visual Studio Community 2015.
machine.config is where it is said to be located.
I haven't installed it yet; that's when the error arises, but I did try to install it by admin which did not work.
Yes.