Hi Laurene,
I have checked the msvcr100.dll in those locations and the list below is the path and version number for that dll.
ArcGIS\Pro\bin 10.0.30319.1
Windows\System32 10.0.40219.332
Im not sure if relevant but here are the msvcr100.dll versions installed for City Engine which runs fine.
Esri\CityEngine2015.1 10.0.30319.1
CityEngine2015.1\jre\bin 10.0.40219.1
Also here is a msvcr100.dll version for my graphics card.
Program Files (x86)\NVIDIA Corporation\LED Visualizer 10.0.30319.460
And a few other versions for other software installed.
Program Files (x86)\Google\Google Earth Pro\client 10.0.40219.1
Program Files\QGIS Lyon\bin 10.0.40219.1
So the Pro and System32 dll are different, however I checked my manager's pc (same build) and he has the same versions for his Pro and System32 dll.
Thanks,
Mike