I ran into a similar issue today on a 2008 R2 DC (I know...). It was listed in programs and features list that it wasn't installed, but the installer wouldn't let me run. Found 2 entries in the registry with "Azure Advanced" that were related to this, removed them, and then the installer went through. Experienced an issue with the installer not being able to find msvcr120_clr0400.dll as well. I installed the .Net Framework 2013 redistributables and then had to re-install .Net 4.7 and finally it's all good.