ORD 2020 R1 Installation Breaks Civil 3D

Has anyone run into a problem when installing ORD 2020 Release 1 tromping on Civil 3D?  We have a limited number of Designers who need both installed. We have not had problems until installing 2020 R1. Apparently (my information is 2nd hand from IT) after installing the new release our civil 3D users reported that C3D would crash on startup.  

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